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scanner electronic manufacturing PCB assembly
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  • scanner PCBA turnkey assembly Manufacturing
    Finding the right scanner can be a challenge. Most can handle everyday office tasks, but they come in a variety of types and sizes that are fine-tuned for different purposes. Here are the key questions to ask to help make sure you pick the right scanner for your needs. We also explore the different kinds of scanners and their features.

    What Do You Need to Scan?
    Knowing what and how often you expect to scan will tell you everything you need to know about the features you'll need. The two most common choices are photos and documents (as unbound pages), but there are other possibilities, too, like books, business cards, film (slides and negatives), magazines, and easily damaged originals like stamps. Somewhat less common are 3D objects like coins or flowers. You should also consider details like the maximum size of the originals and whether you'll need to scan both sides of document pages.

    Do You Need a Flatbed?
    For photos or other easily damaged originals, bound material, and 3D objects, you need a flatbed. (Here we're talking about scanning 3D objects to two-dimensional images; 3D scanners—for scanning objects to 3D files for display or printing—are a different beast entirely.) Originals like photos and stamps can go through a sheet feeder, but you risk damaging them. If you need to scan this sort of original only rarely, you may be able to make do with a sheet-fed scanner that comes with a plastic carrier to protect the originals. Keep in mind, however, that even brand-new, unscratched plastic carriers can degrade scan quality.

    Handheld 3D scanners are used in industrial design, reverse engineering, inspection and analysis, digital manufacturing and medical applications. "To compensate for the uneven motion of the human hand, most 3D scanning systems rely on the placement of reference markers, typically adhesive reflective tabs that the scanner uses to align elements and mark positions in space."[7]

    Portable[edit]
    Image scanners are usually used in conjunction with a computer which controls the scanner and stores scans. Small portable scanners, either roller-fed or "glide-over" hand-operated, operated by batteries and with storage capability, are available for use away from a computer; stored scans can be transferred later. Many can scan both small documents such as business cards and till receipts, and letter-sized documents.

    Smartphone scanner apps[edit]
    Currently installed:

    Sidewater Commons (next to the ITS help desk)
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    Parallel port - Connecting through a parallel port is the slowest common transfer method. Early scanners had parallel port connections that could not transfer data faster than 70 kilobytes/second. The primary advantage of the parallel port connection was economic and user skill level: it avoided adding an interface card to the computer.
    GPIB - General Purpose Interface Bus. Certain drumscanners like the Howtek D4000 featured both a SCSI and GPIB interface. The latter conforms to the IEEE-488 standard, introduced in the mid ’70s. The GPIB interface has only been used by a few scanner manufacturers, mostly serving the DOS/Windows environment. For Apple Macintosh systems, National Instruments provided a NuBus GPIB interface card.
    Small Computer System Interface (SCSI), rarely used since the early 21st century, supported only by computers with a SCSI interface, either on a card or built-in. During the evolution of the SCSI standard, speeds increased. Widely available and easily set up USB and Firewire largely supplanted SCSI.
    Universal Serial Bus (USB) scanners can transfer data quickly. The early USB 1.1 standard could transfer data at 1.5 megabytes per second (slower than SCSI), but the later USB 2.0/3.0 standards can transfer at more than 20/60 megabytes per second in practice.
    FireWire, or IEEE-1394, is an interface of comparable speed to USB 2.0. Possible FireWire speeds are 25, 50, and 100, 400 and 800 megabits per second, but devices may not support all speeds.
    Proprietary interfaces were used on some early scanners that used a proprietary interface card rather than a standard interface.
    Indirect (network) connection to a computer[edit]
    During the early 1990s professional flatbed scanners were available over a local computer network. This proved useful to publishers, print shops, etc. This functionality largely fell out of use as the cost of flatbed scanners reduced enough to make sharing unnecessary.

    A scanner is a device that captures images from photographic prints, posters, magazine pages, and similar sources for computer editing and display. Scanners come in hand-held, feed-in, and flatbed types and for scanning black-and-white only, or color. Very high resolution scanners are used for scanning for high-resolution printing, but lower resolution scanners are adequate for capturing images for computer display. Scanners usually come with software, such as Adobe's Photoshop product, that lets you resize and otherwise modify a captured image.

    From 2000 all-in-one multi-purpose devices became available which were suitable for both small offices and consumers, with printing, scanning, copying, and fax capability in a single apparatus which can be made available to all members of a workgroup.

    Battery-powered portable scanners store scans on internal memory; they can later be transferred to a computer either by direct connection, typically USB, or in some cases a memory card may be removed from the scanner and plugged into the computer.
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    The higher-resolution cameras fitted to some smartphones can produce reasonable quality document scans by taking a photograph with the phone's camera and post-processing it with a scanning app, a range of which are available for most phone operating systems, to whiten the background of a page, correct perspective distortion so that the shape of a rectangular document is corrected, convert to black-and-white, etc. Many such apps can scan multiple-page documents with successive camera exposures and output them either as a single file or multiple page files. Some smartphone scanning apps can save documents directly to online storage locations, such as Dropbox and Evernote, send via email or fax documents via email-to-fax gateways.

    Smartphone scanner apps can be broadly divided into three categories: 1) document scanning apps primarily designed to handle documents and output PDF, and sometimes JPEG, files, 2) photo scanning apps that output JPEG files, and have editing functions useful for photo rather than document editing;[9] and 3) barcode-like QR code scanning apps that then search the internet for information associated with the code.[10]

    Scan quality[edit]

    A flatbed scanner. Documents or images are placed face-down beneath the cover (shown closed here).
    Color scanners typically read RGB (red-green-blue color) data from the array. This data is then processed with some proprietary algorithm to correct for different exposure conditions, and sent to the computer via the device's input/output interface (usually USB, previous to which was SCSI or bidirectional parallel port in older units).

    Color depth varies depending on the scanning array characteristics, but is usually at least 24 bits. High quality models have 36-48 bits of color depth.

    Another qualifying parameter for a scanner is its resolution, measured in pixels per inch (ppi), sometimes more accurately referred to as Samples per inch (spi). Instead of using the scanner's true optical resolution, the only meaningful parameter, manufacturers like to refer to the interpolated resolution, which is much higher thanks to software interpolation. As of 2009, a high-end flatbed scanner can scan up to 5400 ppi and drum scanners have an optical resolution of between 3,000 and 24,000 ppi.

    "Effective resolution" is the true resolution of a scanner, and is determined by using a resolution test chart. The effective resolution of most all consumer flatbed scanners is considerably lower than the manufactures' given optical resolution. Example is the Epson V750 Pro with an optical resolution given by manufacturer as being 4800dpi and 6400dpi (dual lens),[11] but tested "According to this we get a resolution of only about 2300 dpi - that's just 40% of the claimed resolution!"[12] Dynamic range is claimed to be 4.0 Dmax, but "Regarding the density range of the Epson Perfection V750 Pro, which is indicated as 4.0, one must say that here it doesn't reach the high-quality [of] film scanners either."[12]

    Manufacturers often claim interpolated resolutions as high as 19,200 ppi; but such numbers carry little meaningful value, because the number of possible interpolated pixels is unlimited and doing so does not increase the level of captured detail.

    The size of the file created increases with the square of the resolution; doubling the resolution quadruples the file size. A resolution must be chosen that is within the capabilities of the equipment, preserves sufficient detail, and does not produce a file of excessive size. The file size can be reduced for a given resolution by using "lossy" compression methods such as JPEG, at some cost in quality. If the best possible quality is required lossless compression should be used; reduced-quality files of smaller size can be produced from such an image when required (e.g., image designed to be printed on a full page, and a much smaller file to be displayed as part of a fast-loading web page).

    Purity can be diminished by scanner noise, optical flare, poor analog to digital conversion, scratches, dust, Newton's rings, out of focus sensors, improper scanner operation, and poor software. Drum scanners are said to produce the purest digital representations of the film, followed by high end film scanners that use the larger Kodak Tri-Linear sensors.

    The third important parameter for a scanner is its density range (Dynamic Range) or Drange (see Densitometry). A high density range means that the scanner is able to record shadow details and brightness details in one scan. Density of film is measured on a base 10 log scale and varies between 0.0 (transparent) and 5.0, about 16 stops.[13] Density range is the space taken up in the 0 to 5 scale, and Dmin and Dmax denote where the least dense and most dense measurements on a negative or positive film. The density range of negative film is up to 3.6d,[13] while slide film dynamic range is 2.4d.[13] Color negative density range after processing is 2.0d thanks to compression of the 12 stops into a small density range. Dmax will be the densest on slide film for shadows, and densest on negative film for highlights. Some slide films can have a Dmax close to 4.0d with proper exposure, and so can black-and-white negative film.

    Scannx Book Scanner has easy to follow touchscreen instructions. Scans can be saved to a Smart Phone (or Tablet) [must have bar code scanner app downloaded on smart phone or tablet], USB, Google Drive (saves to your google docs – log in with your google account), or send to the patron's Penn State email address.

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    Consumer-level flatbed photo scanners have a dynamic range in the 2.0–3.0 range, which can be inadequate for scanning all types of photographic film, as Dmax can be and often is between 3.0d and 4.0d with traditional black-and-white film. Color film compresses its 12 stops of a possible 16 stops (film latitude) into just 2.0d of space via the process of dye coupling and removal of all silver from the emulsion. Kodak Vision 3 has 18 stops. So, color negative film scans the easiest of all film types on the widest range of scanners. Because traditional black-and-white film retains the image creating silver after processing, density range can be almost twice that of color film. This makes scanning traditional black-and-white film more difficult and requires a scanner with at least a 3.6d dynamic range, but also a Dmax between 4.0d to 5.0d. High-end (photo lab) flatbed scanners can reach a dynamic range of 3.7, and Dmax around 4.0d. Dedicated film scanners [14] have a dynamic range between 3.0d–4.0d.[13] Office document scanners can have a dynamic range of less than 2.0d.[13] Drum scanners have a dynamic range of 3.6–4.5.

    By combining full-color imagery with 3D models, modern hand-held scanners are able to completely reproduce objects electronically. The addition of 3D color printers enables accurate miniaturization of these objects, with applications across many industries and professions.

    For scanner apps, the scan quality is highly dependent on the quality of the phone camera and on the framing chosen by the user of the app.[15]

    Computer connection[edit]

    A film picture being scanned into a computer at the photo desk of the Detroit News in the early 1990s.
    Scans must virtually always be transferred from the scanner to a computer or information storage system for further processing or storage. There are two basic issues: (1) how the scanner is physically connected to the computer and (2) how the application retrieves the information from the scanner.

    Direct physical connection to a computer[edit]
    The file size of a scan can be up to about 100 megabytes for a 600 DPI 23 x 28 cm (9"x11") (slightly larger than A4 paper) uncompressed 24-bit image. Scanned files must be transferred and stored. Scanners can generate this volume of data in a matter of seconds, making a fast connection desirable.

    Scanners communicate to their host computer using one of the following physical interfaces, listing roughly from slow to fast:

    We can help you find the right barcode scanner to meet the demands of your business. From a retail presentation barcode scanner that sits on the counter to a rugged, industrial barcode scanner that is used in the warehouse, Barcodes, Inc. has a barcode reader for any environment. We have barcode scanners that read 1D, 2D, and QR codes, and barcode readers that are compatible with iPhone, iPad, and Android devices. We have a full selection of Laser, USB, Bluetooth, cordless, portable, wireless, handheld, tablet, in-counter, grocery, and even mobile computer barcode scanners! Call one of our experts for a free consultation on choosing the right barcode scanner and software for your business.

    Although every manufacturer publishes scan speeds, these numbers can be deceiving since they’re often just measuring how quickly the paper comes out of the scanner. For a real-world speed test I set each scanner to searchable PDF mode. This enables the OCR conversion, adding a significant amount of time until you have a usable document. But this is, after all, how you’ll be using a scanner, as it makes little sense to scan text and not be able to copy/paste or do a word search.

    I loaded a 20-sheet double-sided business document into each scanner, set resolution to 200 ppi, and measured the time from the press of the start button until the document was ready to be saved on my local drive. My test machine was a MacBook Air running OS 10.12.

    As you can see below, the ES-300W is an impressively speedy scanner, capable of nearly 23 pages per minute (ppm) at 200 ppi. This is only bested by the much larger, heavier desktop Canon C225, and significantly faster than its portable scanner rivals.

    We saved a total of 1,416 document pages before a low battery warning appeared in the scanning app, halting our progress.
    The ES-300W, with its ADF fully extended, has a footprint of 11.3 inches by 9 inches by 9.5 inches, taking up slightly more desk space than a letter-sized sheet of paper. Of course, the scanner’s footprint shrinks dramatically when it’s folded closed, and it can easily slip into a shoulder bag when you’re traveling. Since it has both Wi-Fi and a battery built in you don’t have to pack a wall plug or even a USB cable. And even with its built-in battery, the ES-300W weighs no more than our previous top pick, the Fujitsu S1300i. Epson told us the ES-300W’s battery lasts for up to 700 page scans. Our tests bore that out almost exactly. With a fully charged battery we turned on the scanner’s Wi-Fi and fed the same 11 page double-sided document continuously for one hour. The scanner was set to grayscale duplex mode at 200 ppi, creating identical PDF documents of 22 pages each. We saved a total of 1,416 document pages before a low battery warning appeared in the scanning app, halting our progress. For most users we think this could easily translate into a busy weekend of cord-free scanning, but if you’re traveling on a business trip of several days, you’d want to have either the USB 3 or AC power option at your disposal.

    The included Wi-Fi connection also means that the ES-300W will continue to be useful as some computers transition from USB 3 to USB-C, which has a different shaped plug. So if you have a new 12-inch MacBook, which has only a single USB-C port, you don’t have to worry about needing an adapter or anything else to have your scanner work.

    Epson rates the scanner’s ADF as having a 20-sheet capacity, and we wouldn’t recommend going beyond this limit. On premium-weight laser printer paper we sometimes got paper jam errors when loading the ADF to its maximum. With regular weight paper, or slightly fewer sheets of the heavier stock, we had no problems.

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    Scanners are also available for Penn State students, faculty and staff in a number of ITS labs. For a list of ITS and other scanning non-library scanning resources, see Scanning Resources for Students at Penn State, prepared by I-tech staff.


    KIC Bookeye Scanner
    The KIC Bookeye 4 scanner at the University Libraries is located in the Weltmann lobby across from the Commons Desk:
    Step-by-step directions are on the scanner and located here .
    Pages can be scanned flat or in a V-cradle mode (less strain on the spine).
    Documents can be saved in several formats (e.g, pdf, jpeg, and png).
    Handles materials up to 17 x 24 inches, scans in black & white, grayscale or color. Scans from 100 to 600 dpi resolution.
    Save to USB flash drive, cloud storage or send to email account.
    There is no attached printer.
    More Information on the Bookeye Scanner including step-by-step intructions are located here.

    With the scanner in USB mode, a hardware start button (blue icon) lets you initiate scans directly from the unit. Helpful status lights (right) verify a successful Wi-Fi connection and show battery status. Photos: Amadou Diallo
    Epson’s software bundle lets you save documents as PDFs, Word files, Excel spreadsheets, and unformatted text files, as well as image-friendly formats like JPEG, TIFF, and PNG. In addition to basic parameters like scan resolution and automated filenaming, you can choose from a comprehensive range of settings like the option to skip blank pages in duplex mode, correct skewed feeds, auto-rotate individual pages, and even digitally fill in paper punch holes. These choices can be saved as presets so that once you’ve configured things to your liking, you can use those settings in the future simply by selecting your named preset from a pulldown menu.

    When scanning business cards I was able to load four to six cards at a time, depending on thickness. Anything beyond that would lead to multiple cards being pulled through at once, causing a jam. Text accuracy was very good, with occasional and minor typos. As with the other scanners I tested, though, text on photographic backgrounds isn’t recognized, though the included Presto Biz Card contact management software does retain an image of each scan so you can enter the information manually at your leisure.

    In order to use the Scanner Room, the player must go to the camera station, which activates the drones. After activating, the camera drones will be controllable, and can be used to swim around the environment and map the terrain. These drones have a maximum range of about 500 meters by default before losing connection. Additional drones can be built but only two can charge at the Scanner Room. They can, however, be stolen by Stalkers who will pick them up and chew on them.

    The Scanner Room will also scan for nearby resources, identifying them as red blips on the central hologram. It has a base scanning range of 300 meters and max of 500 meters. The scanner can only search for one resource type at a time and has a base time of 14 seconds, but the searching speed and range can be increased to take 2 seconds at max with the Scanner Room Range Upgrade and Scanner Room Speed Upgrade; you can have more of the same upgrade in the scanner room to extend the range and speed even more. Furthermore, a HUD upgrade allows the player to see where the scanner has identified the resources in a similar fashion to signal devices when equipped in the chip slot of the paperdoll.

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    The TRX-1 allows the user the ability to group their stored objects using up to 200 Scanlists plus a special Skywarn scanlist. Objects can be mapped to as many Scanlists as desired, giving you complete flexibility for grouping objects and selecting groups in any combination for scanning.
    Programmable audible alarms can be configured to sound when certain Scannable Objects are active. Can be used in conjunction with, or separately from, the Alert LED described above.
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    Date and time stamp recorded audio files, and “alarm clock” function allows you to program the scanner to wake up and start scanning at a specific time each day.
    A built-in Discriminator Output provides raw discriminator signal to third party signal decoding software without risky hardware modifications.
    Predefined service search ranges make it easy to find activity in your area.
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    Quickly sweeps the TRX-1's frequency ranges for transmissions from nearby sources. When a nearby transmission is found, the TRX-1 automatically tunes to that frequency and receives the traffic. Lock out found frequencies and continue searching the same band.
    Customize existing programming or add new objects to scan, and keep your TRX-1 firmware and Library data up to date.
    The backlight can be programmed to flash with custom flash patterns when certain objects are active, providing another way alerting the operator when important radio traffic is present.
    displays the weather event and sounds an alert for a specific county or counties of your choice.
    Scan Sets expand the functionality of Scanlists by allowing you to define different combinations of enabled Scanlists as Scan Sets, then you can select one or more Scan Sets for scanning using a simple menu system. With Scanlists and Scan Sets you have unlimited possibilities for grouping, enabling and disabling objects for scanning.
    Shows relative strength of received signals. Slim, compact case design with textured exterior finish and large speaker - Designed for durability, one-handed operation and ease of use.

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    Finally, consider whether you need a special-purpose, rather than general-purpose, scanner. Among the most common special-purpose choices are scanners for business cards (small and highly portable), books (designed to let pages lie flat), and slides (smaller than flatbed scanners, but no better at scanning slides than flatbed scanners with equivalent features).

    Two other possibilities are portable scanners (general-purpose sheet-fed scanners small enough to fit in your laptop bag) and pen scanners (the size of a pen). Some of the latest portable models can operate without a computer, scanning to a memory card, or even to a smartphone. You can also find some that function as both portable and desktop document scanners by combining a portable scanner with a docking station that includes an ADF. Depending on what you need to scan, any one of these may be a good choice, either as your only scanner or as a supplement to a general-purpose scanner.

    Multifunction printers (MFPs) have built-in scanners, nearly all with flatbeds and many with sheet feeders and ADFs. To get the most out of your scanning, however, you'll probably want to get a single-function scanner. Fortunately, there are many models to choose from, and the 10 below are among the best we've tested. For more advice, check out our roundup of the top scanners for photos, or our list of the best all-in-one printers, if having a scanner attached to your printer is more appealing.

    Do You Need a Sheet Feeder?
    If you plan to scan documents on a regular basis—particularly documents longer than one or two pages—you almost certainly want a sheet feeder. Having to open a flatbed lid and set a page in place is a minor chore. Having to repeat the process 10 times for a 10-page document is a tiresome annoyance. Some sheet-fed scanners can also handle thick originals, like health-insurance ID cards.

    Do You Need an Automatic Document Feeder?
    If you'll primarily be scanning one or two pages at a time, a manual sheet feeder is probably all you need. If you'll be scanning longer documents on a regular basis, however, you'll want an automatic document feeder (ADF) that will scan an entire stack of pages unattended. Pick an ADF capacity based on the number of pages in the typical document you expect to scan. If you occasionally have a longer document, you can add pages during the scan. Some ADFs can also handle stacks of business cards well.





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