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Interferometer Cameras

Interferometer Camera Selection

Most older interferometers use analog video cameras that conform to the monochrome RS170 (60Hz) or CCIR (50Hz) broadcast standards. If you are upgrading an older interferometer, we recommend that you replace this video camera with a fully digital camera that connects directly to the computer via FireWire (1394), USB 3.0 or GigE.

You should expect to pay $700 or more for an industrial grade digital camera—about the same as for a video frame grabber. Consumer grade devices are mostly limited to color images and use lossy data compression.

Filter Options

Sensor Type
Image Format
Make and Model
(3 cameras)
DMK 41AF02
DMK 41AG02
DMK 23UP1300
Interface 1394a GigE USB 3.0
Sensor Manufacturer Sony Sony
Sensor Model ICX205AL ICX205AL
Sensor Type CCD CCD CMOS
Format 1/2" 1/2" 1/2"
Active Area (mm) 5.95×4.46 5.95×4.46 6.14×4.92
Pixels (H×V) 1280×960 1280×960 1280×1024
Pixel Pitch 4.65 µm 4.65 µm 4.8 µm
Pixel Depth 8 bit 8 bit 12 bit
Frame Rate (at max res) 15 fps 15 fps 95 fps
Shutter Type Global Global Global
Housing (H×W×L mm) 50.6×50.6×50 50.6×50.6×50 29×29×43
Weight 265 g 265 g 65 g

Recommended Camera Specs

Alignment Camera Recommendation

Your interferometer may have a second video camera used for alignment mode. Since alignment mode image quality is non-critical, we recommend keeping the video alignment camera and interfacing it to the computer with an inexpensive video-to-USB adapter.

IEEE-1394 Format_7 modes

Format_7 modes are custom and defined by the camera manufacturer and vary by camera model. Format_7 modes are typically characterized by region of interest (ROI) and/or pixel binning, although full resolution is for some cameras a Format_7 mode. Both techniques typically result in a faster frame rate. ROI is also known as sub-windowing. For some CCD sensors, ROI may increase the frame rate only if the number of rows is reduced. Pixel binning is typically 1×2 or 2×1 or 2×2 with 2×2 being of most interest because the others result in a distorted image.

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Page updated: 6 November 2018

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