CN101025447A

CN101025447A - Two-face fly-eye lens

Info

Publication number: CN101025447A
Application number: CN 200610023932
Authority: CN
Inventors: 邓运明
Original assignee: Jiujiang 3t Digital Projection Technology Development Co Ltd; XINCHENGZHIDIAN NETWORK TECHNOLOGY Co Ltd SHANGHAI
Current assignee: Jiujiang 3t Digital Projection Technology Development Co Ltd; XINCHENGZHIDIAN NETWORK TECHNOLOGY Co Ltd SHANGHAI
Priority date: 2006-02-17
Filing date: 2006-02-17
Publication date: 2007-08-29

Abstract

The invention supplies a double side compound eye lens, which includes front compound eye lens and back compound eye lens, the front compound eye lens and back compound eye lens as a whole form a piece of glass plate or the two side of other translucent materials relatively form a double side compound eye lens. Because of the invention formed the front compound eye lens and back compound eye lens into a whole, and the front and back compound eye lens lie in the same glass or relative two sides of other translucent materials, the invention saves space greatly and installs easy, light transmittance and evenness have been greatly improved.

Description

Two-face fly-eye lens

Technical field

The present invention relates to a kind of optical lens, particularly a kind of two-face fly-eye lens.

Background technology

Fly's-eye lens claims fly lens, array lens again, is to be produced on an overall lens that constitutes together by a plurality of lenslets.In being commonly used in lamp optical system, realize effect with the illumination light homogenising.

In liquid crystal projector,, need to use fly's-eye lens for the light that light emitted is gone out projects on the liquid crystal board with identical brightness.After having used fly's-eye lens, the uniformity coefficient of light can be brought up to more than 95%.

Two fly's-eye lenses are adopted in the use of generally arranging in pairs or groups of fly's-eye lens in the liquid crystal projector, promptly before fly's-eye lens and back fly's-eye lens be used.Traditional forward and backward fly's-eye lens adopts identical structure, and this is beneficial in simplified design with aspect reducing cost, but is unfavorable for improving the utilization factor to illumination light.Because when light source was radiated at the back fly's-eye lens after by preceding fly's-eye lens, middle hot spot was big, the hot spot of outer rim is little, and its hot spot long axis direction has an inclination angle.If each lenslet is all made identical size on the back fly's-eye lens, will cause " overflowing " of centre hot spot so, and outer rim place hot spot can not be radiated at fully in the corresponding lenslet.If hot spot shines the lenslet seam crossing, because technological problems, these light will become parasitic light and lose.Also have because lenslet is corresponding relation on the forward and backward fly's-eye lens, in the past the irradiate light of the some lenslet outgoing of fly's-eye lens luminous energy during corresponding lenslet in the fly's-eye lens of back just can work, if these irradiate light other lens in the fly's-eye lens of back, these light also can become parasitic light and lose.Like this, the luminous energy at centre and outer rim place all can have big part to lose, and capacity usage ratio is low.

In addition, adopt two independently fly's-eye lenses, occupy bigger space in projector, and in order to make forward and backward fly's-eye lens become corresponding relation, installation difficulty is very big, installing badly then influences its translucent effect, thereby influences the quality of projector.

Summary of the invention

Purpose of the present invention, being provides a kind of two-face fly-eye lens at above shortcomings in the prior art and defective.

The object of the present invention is achieved like this: a kind of two-face fly-eye lens, fly's-eye lens and back fly's-eye lens before comprising, described preceding fly's-eye lens constitutes two-face fly-eye lens with back fly's-eye lens integral manufacturing on the relative two sides of same glass plate or other light transmissive materials.

Each lenslet quantity before described on fly's-eye lens and the back fly's-eye lens is equal, and corresponding one by one.

The thickness of described two-face fly-eye lens is 10-40mm.

Part or all of lenslet before described on the fly's-eye lens can have eccentric structure.

Whole lenslets before described on the fly's-eye lens are square.

Part or all of lenslet on the fly's-eye lens of described back can equal and opposite in direction, also can not wait.

The shape of the part or all of lenslet on the fly's-eye lens of described back can also can be polygon for square.

Fly's-eye lens and back each lenslet on the fly's-eye lens can be a sphere before described, and its radius-of-curvature can equate, also can be unequal.

The surface of each lenslet before described on fly's-eye lens and the back fly's-eye lens can be an aspheric surface.

Two-face fly-eye lens of the present invention is owing to be made into an integral body with the front and back fly's-eye lens, fly's-eye lens is positioned at the relative two sides of same glass plate or other light transmissive materials before and after making, saved the space greatly, and be convenient to install, the transmitance of light and uniformity coefficient have all obtained large increase.

Description of drawings

Fig. 1 is the structure front elevational schematic of two-face fly-eye lens of the present invention;

Fig. 2 is the structure schematic side view of two-face fly-eye lens shown in Figure 1.

Embodiment

Referring to Fig. 1, Fig. 2, fly's-eye lens 1 and back fly's-eye lens 2 before two-face fly-eye lens of the present invention comprises, preceding fly's-eye lens 1 constitutes two-face fly-eye lens with back fly's-eye lens 2 integral manufacturings on the relative two sides of same glass plate or other light transmissive materials 3.The Thickness Design of this two-face fly-eye lens is 10-40mm.Preceding fly's-eye lens 1 and back fly's-eye lens 2 all are made up of

polylith lenslet

11,21 compact arrangement, and each the lenslet quantity on preceding fly's-eye lens and the back fly's-eye lens is equal, and corresponding one by one.Wherein, the whole lenslets 11 on the preceding fly's-eye lens 1 are square; Its part or all of lenslet can have eccentric structure; Each lenslet can be sphere or aspheric surface, and when each lenslet was sphere, its radius-of-curvature can equate, also can be unequal.Part or all of lenslet on the back fly's-eye lens 2 can equal and opposite in direction, also can not wait; Its shape can also can be polygon for square; The surface of each lenslet can be an aspheric surface.

Claims

1, a kind of two-face fly-eye lens, fly's-eye lens and back fly's-eye lens before comprising is characterized in that: fly's-eye lens constitutes two-face fly-eye lens with back fly's-eye lens integral manufacturing on the relative two sides of same glass plate or other light transmissive materials before described.

2, two-face fly-eye lens as claimed in claim 1 is characterized in that: each the lenslet quantity before described on fly's-eye lens and the back fly's-eye lens is equal, and corresponding one by one.

3, two-face fly-eye lens as claimed in claim 1 is characterized in that: the thickness of described two-face fly-eye lens is 10-40mm.

4, two-face fly-eye lens as claimed in claim 1 is characterized in that: the part or all of lenslet before described on the fly's-eye lens can have eccentric structure.

5, two-face fly-eye lens as claimed in claim 1 is characterized in that: the whole lenslets before described on the fly's-eye lens are square.

6, fly's-eye lens as claimed in claim 1 is characterized in that: the part or all of lenslet on the fly's-eye lens of described back can equal and opposite in direction, also can not wait.

7, fly's-eye lens as claimed in claim 1 is characterized in that: the shape of the part or all of lenslet on the fly's-eye lens of described back can also can be polygon for square.

8, two-face fly-eye lens as claimed in claim 1 is characterized in that: fly's-eye lens and back each lenslet on the fly's-eye lens can be a sphere before described, and its radius-of-curvature can equate, also can be unequal.

9, two-face fly-eye lens as claimed in claim 1 is characterized in that: the surface of each lenslet before described on fly's-eye lens and the back fly's-eye lens can be an aspheric surface.