2 products in this product line

 

Optical low-pass filters (OLPF) are mainly for high image quality by eliminating screen effect, which was popular in CCD or CMOS array detector image systems. OLPF was designed by crystal birefringence characteristic, and depends on various CCD specification requirements. For high quality demand, crystal would design by different thickness, incidence angle, and pieces stacking. 

Usually, there are anti-reflecting coatings for increasing transmittance, which also prevent ghost image. Meanwhile, IR cutting coating will properly press infra-ray for IR sensitive CCD. COT also accepts custom designed specification for IR cutting coating.


Specifications

 Model No.
 Q316345000
 Q316325000
 CCD size
 1/3” CCD
 1/3” CCD
 Pixel size
 4.65 μm
 4.65 μm
 OLPF size
 8.5 × 7 mm2
 8.5 × 7 mm2
 Thickness
 3.2 mm
 3.2 mm
 Spectrum
 625/850 nm
 625/850 nm
 Effective Area
 90%
 90%
 Parallel
  ≦1 minute
 ≦ 1 minute
 Flatness
  ≦3 fringes
 ≦ 3 fringes
 Dig  < 40 μm (inside effective area)  < 40 μm (inside effective area)
 Scratch  < 10 μm (inside effective area)  < 10 μm (inside effective area)
 Crack  One (outside effective area)  One (outside effective area)