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Questions tagged [ccd]

Charge Coupled Device - a series of MOS capacitors with over lapping electrodes that form depletion regions in a Si substrate that when operated in sequence form a bucket brigade device. Originally developed for sampled analog signal processing, they primary saw their hey day as Image sensor devices. Usually referred to in their image sensor capacity.

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CCD output buffer

Reading the KAF-8300 CCD datasheet, I came across what looks like an emitter-follower to buffer the analog video output, see below: Also from the datasheet: Charge presented to the floating ...
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Unused lines in RGB linescan sensor

For the exploration of a CCD line scan sensor, I would like to ignore two colors on an RGB sensor. What should I do? Just not connect clocks and outputs? Tie them to ground? The sensor in question ...
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CCD terminology, especially “clamp”

I am trying to drive a linear CCD sensor for use in scanning photo camera. My current candidate is a PD3728DZ from NEC. I do understand the basic principle of CCDs, and I think I understand the ...
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Noisy signals with 2-layer PCB - What's wrong with my design?

For my master's thesis in computer science, I need to read out a TCD1304AP linear CCD sensor. A STM32 microcontroller with the circuit laid out on a breadboard gets the job done, but in order to make ...
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2answers
115 views

ccd application circuit

I'm trying to use a ccd linear image sensor (µPD3753) and I'm using the application circuit example in its datsheet, however I'm new at using these type of sensors. Can someone please explain why they'...
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107 views

What is the difference CMOS and CCD image sensors? In terms of Infrared spectrum [closed]

What is the difference between CMOS and CCD image sensor arrays? i.e working principles. Please consider in infrared spectrum. Which one's fabrication is expensive/ or cheap ? Which one gives ...
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CCD sensor: Digital Counts vs Exposure plot vs Dark Digital Counts

First, my question concerns an individual pixel/sensor from a CCD array of a digital camera. From my understanding, the Digital Counts is linear with Exposure time. However, this line will be ...
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Why is 30MHz Clock signal distorted on oscilloscope?

I'm trying to probe a 30MHz clock signal, coming from an FPGA and routed to a CCD sensor. There are no other components, other than connectors, between source/destination. When I probe this signal ...
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1answer
1k views

How to estimate green or yellow based on the output of RCCC CMOS image sensor

RCCC is a kind of color filter array with one Red filter and three Clear filters, which means it only outputs red color or monochrome signal (Interfacing Red/Clear Sensors ) I know that some RCCC ...
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1answer
71 views

PIC24E PWM ISR hangs?

I am working with PIC24EP256GP204. The CPU frequency is 64 MHz. I am generating two PWM pulses for TCD1304AP CCD sensor and two PWM pulses for WM8253 ADC AFE. My problem lies with PWM pulses for ADC ...
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2answers
122 views

Largest spectrum image sensor and processing its entire spectrum image

I was developing a digital system to process raw images stemming from an image sensor but I would like to deal with "universal" (as possible) spectrum image sensors with no filter. I know that for ...
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6answers
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Can camera sensors be damaged by light?

Suppose a 3.3 V white (or any colour) LED with a current draw of 20 mA is shone into the lens of a cheap webcam (or any budget camera) at close range (< 3 cm) for a long period of time (24 hrs) or ...
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Sony ILX186K Linear CCD Datasheet

I'm looking for the datasheet for a Sony ILX186K linear CCD sensor I've salvaged from a document scanner. This part was discontinued several years ago and the datasheet seems to be unavailable online ...
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434 views

Electric Shutter Functions for CCDs Raspberry pi

I have been trying to incorporate CCD linear array into my circuit. However, I have never dealt with electric shutter functions which are necessary to operate the CCD. Here is the link to the ...
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1answer
98 views

taking long exposure image with CCD sensor

Assuming you use a CCD image sensor, would it be possible for you to take images with exposure time of 1s without stacking image? I'm wondering how you can decrease data rate of the CCD. CCD camera ...
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1answer
97 views

Develop a system to differentiate laser pointers from the ambient light based on the information collected by two arrays of digital FPA detectors

I would like to develop a system to differentiate laser pointers from the ambient light based on the information collected by two arrays of digital FPA detectors embedded inside the cavity of a ...
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1answer
646 views

How can I build a laser detector whit ILX554B CCD linear?

I am trying to build a CCD camera with a Sony ILX554B CCD Linear sensor to work with optical experiments. My problem is that I have this sensor, but I can't find an explanation or relevant circuit to ...
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1answer
241 views

What component most limits a camera's frame rate?

I have a quick question here when I started wondering how they made slo-mo cameras: What is the part that most limits frame rates in average smartphone cameras? Is it the CCD chip, or a component in ...
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2answers
139 views

CCD resolutions in camera

I would like to know what are the available (industry standard) CCD sensor resolutions for cameras in the visible light. What is the highest CCD resolution that can be found in the industry?
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1answer
281 views

Could a barcode scanner be used to get surface depth information?

(if tl;dr, go to the part where it says "actual question") this is probably a very obscure question, but: I'm working on a rather complex art installation with computer-generated sculptures, and I'm ...
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1answer
330 views

CCD Reset switch and sense capacitor

I'm trying to understand the circuit in figure 1 of this document which describes CCD interfacing (http://www.analog.com/library/analogdialogue/archives/32-1/signal_pro.html). Shown below: ...
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1answer
980 views

OV7670 frames are 640x308 not 640x480

There is a lot of helpful information on the internet about getting the OV7670 camera up and running but the following problem has me a bit stumped. I am using a Maple r5 Board (STM32F103RBT6) to ...
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1answer
320 views

How do they read out HD, high frame rate CCD image sensors

Having little experience with CCD image sensors, I have learned that reading pixels via shift registers from a relatively large size CCD must be fast to achieve some reasonable frame rate. Let's say, ...
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3answers
496 views

Need help finding datasheet or pinout for Toshiba TCD2907DG

I really want to play with Toshiba TCD2907DG - this is color linear CCD sensor. I've found a number of datasheets for other TCD*, but not this one. I would really appreciate any reference to ...
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1answer
592 views

High-Sensitivity, Low-Latency Imaging Sensor

This might be a bit of a long shot for this venue, but: I'm looking into sensors for a scientific imaging application where the key is excellent sensitivity (quantum efficiency and noise performance) ...
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2answers
601 views

Blocking wait for pin change on a LPC1114 microcontroller

I need to synchronize the rising edge of a PWM with another signal pulse's falling edge on a LPC1114FN28 (trying to drive a TCD1304DG), but am failing to achieve this so far. I have tried the ...
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1answer
619 views

How does the iso work in ccd\cmos array detectors

I'm curious to know how exactly does the iso sensitivity work in ccd's or cmos detectors that DSLR cameras have? I understand this is a amplification of the raw signal that each pixel has, but is in ...
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2answers
1k views

Convert counts CCD output to irradiance units

I'm performing some tests with a spectrometer (a model similar to this one but more recent) equipped with a CCD. I can only output to counts, not W/(m^2*nm) (ie: irradiance units) which is what ...
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3answers
4k views

Difference between Buried Photodiode and Pinned Photodiode

What is the difference between Buried Photodiode and Pinned Photodiode? I understand that the P+/N/P structure where the P+ and P layers have the same potential is the Pinned Photodiode. So what is ...
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1answer
6k views

What's the difference between a thermal imaging sensor and an infrared CCD?

I was always under the impression that thermal radiation is essentially infrared energy, so what's the difference between a full thermal imaging camera (e.g. an FLIR) and a standard infrared CCD chip? ...
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1answer
482 views

Help me to drive the CCD ICX282AQ

This is the first time I am working with an image sensor. I have the datasheet of the ICX282AQ. But I don't understand much. What I would like to do is: Can I drive this sensor with an Arduino board ...
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1answer
341 views

Calculate EMVA1288 temporal dark noise

Say I have a dark current plot (image mean over shutter time) with an offset (y-intercept) of 4100 and system gain K = 4.23, is the following calculation correct? Variance of dark signal = sqrt(4100) ...
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1answer
696 views

Color binning on Bayer sensor

Is there a difference between doing binning on a Bayer sensor before or after the ADC with respect to spatial information lost? How the debayering works should not matter, Assuming the same method ...
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1answer
2k views

vacuum compatible compact CCD camera

I need a CCD camera that can be used inside vacuum. Not the flange mounted types used in XUV-X-ray applications, but small compact preferably less than 20 mm dia housing. Does anyone have experience ...
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2answers
14k views

How do I make use of a scrapped CCD sensor from a scanner?

I obtained an old scanner with no power adapter. I wired it up to something with a compatible adapter, but apparently this particular scanner is very tied to it's power supply(even though it's suppose ...