Sunrays focusing apparatus
System and camera for controlling depth of field in three-dimens
Table with integral projector
Test image projector for testing imaging devices
Three dimensional display
Three-dimensional image display apparatus and a screen therefor
Transmission type projection screen
Two color liquid crystal light valve image projection system wit
Two-color liquid crystal light valve image projection system wit
Unitary prepolarizing prism assembly for a four color liquid cry
Unitary prepolarizing prism assembly for a four color liquid cry
Wide angle view optical system
Zoom lens apparatus with adjustable aperture