Four-group zoom lens
Four-piece imaging lens module
Four-piece lens assembly
Four-piece lens assembly
Four-unit zoom lens system having a high zoom ratio
Fourier transform lens assembly
Fresnel lens
Fresnel lens
Fresnel lens and an illuminating device provided with the...
Fresnel lens for projection screens
Fresnel lens sheet and rear projection screen
Fresnel lens sheet, process of producing Fresnel lens sheet,...
Fresnel lens with aspheric grooves
Fresnel lens with cavities
Fresnel lens, backprojection screen, and corresponding...
Fresnel magnifying lens cardholder
Fresnel magnifying lens for forming a hand-held pocket-sized hyb
Fresnel optical element and projection display apparatus
Fresnel optical element and projection display device
Friction connector for optical flats in interferometers