| 摘要 |
FIELD: optical instrument engineering. ^ SUBSTANCE: Optical circuit of projection set has two optical modules. Lens module has correction-power lens and combined lens. Combined lens has symmetrical convex-convex glass component. Optical module of cathode-ray tube (CRT) has correction member, window of CRT and cooling fluid. Power lens has symmetric convex-convex glass component and plastic layer having spherical contact surface and external non-spherical surface. Relative focal power of combined lens equals to 0,95-0,98 optical power of the whole objective. ^ EFFECT: reduced cost of production; high quality of image. ^ 1 cl, 5 dwg |
