CMOS image sensors (complementary metal oxide semiconductors) operate at lower voltages than CCDs, reducing power consumption for portable applications. Each CMOS active pixel sensor cell has its own buffer amplifier, and can be addressed and read individually. A commonly used cell has four transistors and a photo-sensing element. The cell has a transfer gate separating the photo sensor from a capacitive "floating diffusion," a reset gate between the floating diffusion and power...
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Q & A on CMOS Image Sensors

We asked our users for their input on CMOS Image Sensors. Here are the results of 110 users familiar with CMOS Image Sensors.

Who Took Our Poll? | Design Trends | Applications and Use | Features | Buying Advice |

Who Took Our Poll?Top

Design TrendsTop

Q:
What new technologies are influencing CMOS image sensor design?
15 answers
Answers:
Low light imaging with low quantum noise. High resolution and high frame rates. Temporal pixel multiplexing for simultaneous high-speed, high-resolution imaging developed by the University of Oxford, in the U.K.
~Technical Support/Services, Lane Cove West, Australia
Complementary Metal Oxide Semiconductor (CMOS) technology: These have included superior signal-to-noise ratio, sensitivity, and freedom from geometric distortion.
~Design Engineer, Oslo, Norway
Smaller technology feature size and smaller pixel size while maintaining the image quality.
~George V, Project Manager, Colorado Springs, CO
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Q:
From your perspective, which companies are creating the most innovative CMOS image sensors?
19 answers
Answers:
I am not updated-but Luminera seems to have something close to my needs.
~Lars J. J., Builder/Contractor, Close to Trondheim, Norway
OnSemi Sony should be doing that CMOSIS
~Bill S., Purchaser, Eindhoven, Netherlands
Cypress, Aptina, Omnivision, e2V, Tower
~Ainsley K, Research & Development, Bristol, United Kingdom
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Applications and UseTop

Q:
What are some of the applications you have used CMOS image sensors for?
26 answers
Answers:
High frame rate. IR sensitive devices. Low cost imagery. Low light - special CMOS sensors. High dynamic range.
~Moshe Y, CTO, Jerusalem, Israel
High speed, high frame rate arrays High sensitivity, low light level, High density pixels Bio- sensing array
~Avner E, Engineering Consultant, Haifa, Israel
I am still trying to find a reasonably priced 2MP 1000 fps sensor for biomedical applications.
~Technical Support/Services, Lane Cove West, Australia
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Q:
Please share with us any “non-standard” applications that CMOS image sensors have been used for.
11 answers
Answers:
Oh-I think all that needs a video/photo documentation is the answer! Left to see, but CMOS capture and scopes requires certain specifications and is therefore a challenge to the developers for a long time to come. The need for new imaging censors might be the answer to the problem. I heard something was going on concerning this issue. I wait for that.
~Lars J. J., Builder/Contractor, Close to Trondheim, Norway
Inspection of soldering during work with HDR CMOS. Multiple barcode read with very high resolution CMOS sensor.
~Moshe Y, CTO, Jerusalem, Israel
Http://www.nature.com/nmeth/journal/v7/n3/abs/nmeth.1429.html
~Technical Support/Services, Lane Cove West, Australia
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Q:
Do you know of any disastrous mistakes that occurred due to the incorrect usage of CMOS image sensors?
5 answers
Answers:
A person thought he found a set of new stars - After cleaning a bunch of hard-to-remove black spots (trapped charges) showed up.
~Engineering, Design, Kessel-Lo, Belgium
Trying to use a microprocessor or DSP that doesn't have a internal hardware structure that processes the image in a pipeline.
~Marcos O, Design Engineer, Curitiba, Brazil
Select proper system setting to have right dynamic range at sensor level.
~Avner E, Engineering Consultant, Haifa, Israel

FeaturesTop

Q:
What would your design or feature "wish list" be for this product?
18 answers
Answers:
The shift from passive-pixel to active-pixel technology helps CMOS sensors to achieve competitive quality. Modern CMOS sensors also include an amplifier for each pixel. After amplification, the voltage output of the pixel is transferred via a micro-wire to the output of the chip.
~Design Engineer, Oslo, Norway
High resolution 10MP at 100 fps, high speed up to 1,000 fps at 1920 x 1080, monochrome, 4.1" focal plane array, at a cost ideally of $30 per sensor, minimum order of 10 units.
~Technical Support/Services, Lane Cove West, Australia
The. sensor and the circuit separated-usb -wired. Small diameter:25-50cm. Dynamic range and all the last/up to date parameters included.
~Lars J. J., Builder/Contractor, Close to Trondheim, Norway
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Buying AdviceTop

Q:
Do you have any advice for people relative to buying or using CMOS image sensors?
8 answers
Answers:
Think carefully about what the customer requires in terms of the image resolution and frame rate before selecting the most appropriate sensor for the job.
~Ainsley K, Research & Development, Bristol, United Kingdom
Try to buy a kit for development where the microprocessor or DSP is already chosen and the firmware are presented as open code.
~Marcos O, Design Engineer, Curitiba, Brazil
Use the EMVA 1288 Standard, Some specifications used today could mean different things to different manufacturers.
~Research & Development, Yavne, Israel
It is getting much better lately and can compete with CCD and in some cases fit in cases CCD's can't .
~Moshe Y, CTO, Jerusalem, Israel
Make sure you can assemble the sensor in an ESD-proof, clean environment.
~Engineering, Design, Kessel-Lo, Belgium
Try to understand the specs and sensor operation.
~George V, Project Manager, Colorado Springs, CO
Check MTF performance on system design.
~Avner E, Engineering Consultant, Haifa, Israel
Need to find high sensitivity
~Vadim G, Process Engineer, Moscow, Russia

Q:
Is there any advice you want to share with users to help them avoid common errors in selection or usage of CMOS image sensors?
8 answers
Answers:
- Don't use it for star trackers. - Take care with static charges close to the image sensor (fi. during cleaning)
~Engineering, Design, Kessel-Lo, Belgium
Check MTF performance on system design. Verify uniformity parameters in low light level applications.
~Avner E, Engineering Consultant, Haifa, Israel
Sensor size must be matched properly with objective lens characteristics.
~Ainsley K, Research & Development, Bristol, United Kingdom
Just research the difference between CCD and CMOS before you buy.
~Engineer, San Antonio, TX
Learn about the difference between global and rolling shutter.
~Moshe Y, CTO, Jerusalem, Israel
Don't try to use rolling shutter in industrial applications.
~Marcos O, Design Engineer, Curitiba, Brazil
Try to understand the specs and sensor operation.
~George V, Project Manager, Colorado Springs, CO
Don't take small size
~Vadim G, Process Engineer, Moscow, Russia


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