OPTICAL SYSTEM FOR TWO-CHANNEL COLLIMATED DISPLAY Russian patent published in 2015 - IPC G02B27/18 G02B27/01 F41G1/30 

FIELD: physics.

SUBSTANCE: optical system for a two-channel collimated display comprises, arranged in series on a beam path, a cathode-ray tube (CRT) display, a beam splitting filter, a display grid, a two-component collimating lens and a two-component reflector. The indicator grid is in the form of a transparent plane-parallel plate illuminated by an additional light source, said plate having light-scattering bars from which light is scattered towards the beam splitting filter. The beam splitting filter is in the form of a plane-parallel dichroic mirror, which transmits light flux from the CRT display and reflects light flux from the indicator grid towards the two-component collimating lens. The two-component collimating lens comprises series-arranged first component - converging lens, a flat reflecting mirror inclined towards the axis of the CRT which breaks the optical axis of the lens and a second component consisting of a first converging, a second diverging and a third converging lens.

EFFECT: simple design of the collimating display and reduced weight and size thereof.

2 cl, 1 dwg, 1 tbl