Detector format  1024 x 1024
Detector material  HgCdTe 
Spectral range  0.75 - 2.40 µm for imaging mode 
1.10 - 1.80 µm for spectroscopic mode 
Plate scale  0.211 +/- 0.001''/pixel 
Total field of view  3.6' x 3.6' 
Operating temperature  77 K 
Readout noise 
~ 15 e-/pixel 
Dark current  0.02 e-/sec 
Full well capacity  55 000 ADU/110.000 e- 
Linearity (1%)  40 000 ADU/80.000 e-
Mean quantum  efficiency  (detector only)
76 % (for 99.5% of pixels)
Minimum integration time  0.1 sec 
Maximum integration time  1 hour (not recommanded)  
Readout time (full frame)  0.5 second (fast read) to 2s (slow read) 

CFHT-IR main characteristics

Orientation: North is up and East is right,  within about 1 degree. The exact orientation varies slightly from one setup of the instrument to the next one, so for a more accurate measurement ask your SA who may have determined this value during setup, or can otherwise suggest an astrometric calibration field that you can briefly observe.

Subraster: any size is allowed, as long as the number of pixels is a power of two,  anywhere within one of the 4 quadrants.

The center of the focal plane array is the intersection of the 4 individual chips that make up the whole detector. It often shows residual low level artefacts, and we therefore recommand that you move your source slightly off center.

Orientation: North up, East right within 1 degree for a Cassegrain Bonnette angle of zero.

Distortions: < 0.3% for the whole field.

Internal flexure: TBD.

Filters: 16 positions, including one blank for dark exposures and one empty position in each of the two filter wheels.