Global Shutter Camera

Most of the DSLR cameras and mobile phone’s cameras are using Rolling Shutter technology including Canon, Nikon, and iPhones, while industry cameras are using Global Shutter technology. Why cameras are so different, let’s take a look at the facts of these two kinds of technology.

Rolling Shutter

Rolling Shutter, usually found in CMOS sensors is a method of capturing an image that does not expose the entire sensor pixels simultaneously, actually it exposures line by line from top to bottom.

Global Shutter

Rather than the rolling shutter camera, the global shutter camera exposures all pixels at the same time. The shutter opens at a certain time then closed, blocking the light enter into the sensor.

Here is a short demonstration of how rolling shutter works in a simplified 10×10 CMOS sensor.

What Is Rolling Shutter And Why It Is Cool

Rolling Shutter vs Global Shutter

Which is better: Rolling Shutter or Global Shutter?

Usually, CMOS sensors use rolling shutter systems while CCDs use global shutters. However, this is not universally true. There are CMOS sensors with global shutters and CCD sensors with rolling shutters.

Most of the people think that the rolling shutter is bad. I don’t think so, it is just a kind of technology. There is no better from one than the other if you don’t compare them according to a given application. General speaking rolling shutter is good when low cost, high resolution, and high frame rate is needed, while the global shutter is good for fast moving objects and machine vision applications.

Global Shutter Camera Breakout From ArduCAM

ArduCAM now introduces two global shutter camera headboard based on ON-Semi (used to be Aptina) MT9V022/ MT9V034 (0.3MP) and AR0134/AR0135 (1.2MP). The camera headboard can be used with ARM, DSP, FPGA so similar platforms with parallel camera interfaces.

ArduCAM also provides USB camera shield for seamless integration for these global shutter camera board. Mono and color types are available for both types. The main spec for each sensor list below.

Part NumberOV7251MT9V022/MT9V034AR0134/AR0135
Array Size640(H) x 480(V)752(H) x 480(V)1280(H) x 960(V)
Optical Format1/7.5″ inch1/3″ inch1/3″ inch
Frame Rate100fps at full resolution60fps at full resolution54fps at full resolution

 

60fps at 720p

DAC output10-bit10-bit12-bit
Trigger modeAuto or external trigger inputAuto or external trigger inputAuto or external trigger input
Power Consumption119mW160mW400mW
Operation Temperature-30 ~ +70°C-40 ~ +85°C-30 ~ +70°C
ColorMono Bayer PatternMono/RGB Bayer PatternMono/RGB Bayer Pattern
Pixel Size3μm6μm3.75μm
Responsivity10.8V/Lux-sec4.8V/Lux-sec6.1V/lux-sec
Dynamic RangeLinear:69.6dBLinear:60dB, Extended: 100dB64dB
Lens mountStock lensC/CS or M12.5 mountC/CS or M12.5 mount

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Video Demo