Hitachi Infrared B/W Camera Module BE-IR20 - Manual (Page 7)

6. External view
BE-IR20 / 21 6
Dimensions
7. Optical dimensions
Lens
19.2 ± 0.5
(C-mount)
1.4 ± 0.2
CCD
Base plate
Imaging face
Lens-mount
Extension of optical path due
to the thickness of CCD glass
is considered.