OPTICAL PROJECTOR SYSTEM Russian patent published in 2012 - IPC G03B21/10 G02B27/18 H04N5/74 

FIELD: physics.

SUBSTANCE: optical system has an optical modulator, an optical inversion system which forms an intermediate image plane which is projected by the frontal optical system onto a mirror which reflects the image onto a screen. The optical modulator has red, green and blue colour components which can be shifted. The optical inversion system has more than two groups of lenses which can move along the optical axis in order to change the size of the image. The shape and arrangement of lenses of the frontal optical system are such that chromatic aberrations resulting therefrom are partially compensated for by shifting intermediate images along the optical axis, formed by each of the colour components of the optical modulator, and the shifting of intermediate images is compensated for by shifting optical modulators of the colour components. The distances between the intermediate image plane and the reflecting mirror, between the optical axis and the edge of the intermediate image plane, between the plane of the optical modulator and the reflecting mirror and between the optical axis and the edge of the plane of the optical modulator satisfy conditions given in the claim.

EFFECT: higher luminosity, angle of view, magnification range, image quality and shorter projection distance with compact sizes.

9 cl, 12 dwg, 5 tbl