Optoelectronic camera with anti-reflective coating having a continuously variable thickness and method of making same

摘要

PCT No. PCT/FR95/00847 Sec. 371 Date Jun. 10, 1996 Sec. 102(e) Date Jun. 10, 1996 PCT Filed Jun. 26, 1995 PCT Pub. No. WO96/00886 PCT Pub. Date Jan. 11, 1996A spectral imager or spectrophotometer-type optoelectronic camera including an optical system, a CCD-type set of photosensitive elements (3) at the focus of the optical system, a transparent protective window (5) arranged in front of the sensitive face (4) of the set of photosensitive elements (3), and a spectral disperser (1) allowing spectral analysis of the scene observed by the camera. The sensitive face (4) of the set of photosensitive elements (3) that points toward the protective window is coated with a monolayer or multilayer coating of anti-reflection material (9) whose thickness (e) varies continuously as a function of the wavelength of the light received by the sensitive face, parallel to the dispersion axis of the disperser (A).