Combined on-axis and off-axis illumination
Compact lens with external aperture stop
Contrast reinforcement for displays
Controllable horizon diaphragm for planetaria
Decentered field lens with tilted focal plane array
Device for producing ring-shaped laser spot
Diaphragm device for light source light adjustment
Diaphragm mechanism of zoom lens barrel
Double-wavelength aperture restricting filter and optical...
Dual aperture lens
Endoscope objective lens
Exposure device
Flare stoppper and taking lens unit
Focusing systems for perspective dimensional measurements...
Illumination optical system, exposure device using the...
Illumination optical system, exposure device using the...
Image display apparatus
Image display apparatus
Image display apparatus
Image pickup apparatus