Patent ID: 9448464
Filing Date: 2016-09-20
CPC Classification: G02B,G03B

Claim Text:
1. A projector, comprising: an image beam generator for generating an image beam; and a projecting lens for receiving the image beam from the image beam generator and projecting the image beam onto a screen, wherein the projecting lens includes a relay system and a projection system, and the relay system is closer to the image beam generator than the projection system; wherein the relay system has a focusing set and a converging set, and the focusing set is closer to the image beam generator than the converging set; the focusing set has at least a lens, and the converging set has at least a lens; the focusing set is between the image beam generator and the converging set, and is reciprocated relative to the converging set; wherein the projection system has a projection lens group and a reflector, and the projection lens group is between the relay system and the reflector; the projection lens group has a first optical surface and a second optical surface, and the first optical surface is closer to the converging set than the second optical surface; wherein the image beam of the image beam generator emits through the focusing set and the converging set in sequence, and then enters the projection lens group via the first optical surface, and leaves the projection lens group via the second optical surface to be reflected by the reflector; and then the image beam enters the projection lens group again via the second optical surface, and then leaves the projection lens group via the first optical surface to be projected onto a screen.