1results about How to "Increase screen brightness" patented technology

The utility model discloses a kind of projection optical lens and projection optical system, it is related to projection lens technical field, wherein, including first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, ninth lens and emitting light chip sequentially arranged from object side to image side along optical axis, the refractive power of first lens, second lens, fifth lens, seventh lens is negative, the refractive power of remaining lens is positive;Wherein, first lens, second lens are plastic aspheric lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens and ninth lens are glass spherical lens, the aperture value F of projection optical lens is less than or equal to 2.0;The lens of utility model provides, and picture brightness is high, by different lens mutual combination and reasonable allocation refractive power, with low cost, high brightness and very good abenign performance, picture is brighter, projection effect is better.