CN2461016Y

CN2461016Y - Lenticular array

Info

Publication number: CN2461016Y
Application number: CN 00244520
Authority: CN
Inventors: 陈波; 杜春雷; 曾红军; 郭履容; 邓启凌; 潘丽; 周礼书; 邱传凯; 王菁
Original assignee: Institute of Optics and Electronics of CAS
Current assignee: Institute of Optics and Electronics of CAS; Academy of Opto Electronics of CAS
Priority date: 2000-09-25
Filing date: 2000-09-25
Publication date: 2001-11-21
Anticipated expiration: 2010-09-25

Abstract

The utility model discloses a micro lenticular array. The surface of the micro lenticular array is continuous embossment. The micro lenticular array is composed of a base seat and a plurality of micro lenticular units on the base seat, a gap does not exist between every two micro lenticular units forming the micro lenticular array. The utility model overcomes the problem that the existing micro lenticular array has diffraction color difference, lower diffraction rate and poor imaging quality. Because the continuous embossment micro lenticular array of the utility model has favorable characteristics, the utility model has wide and important application prospects in multiple fields of infrared optics, optical calculation, optical interconnection, optical communication, etc., or even micro system sciences.

Description

A kind of micro lens array

The utility model is a kind of micro lens array, belongs to the improvement to micro lens array shape and performance.

Micro lens array has important and application widely in many scientific domains, is the representative elements of micro-optic.Existing several micro lens array mainly is divided into two classes: micro fresnel lens array and hot melt refractive micro lens array.

The micro fresnel lens array is made up of the lenticule unit that a plurality of surfaces are stepped ramp type, and its surface is discontinuous embossment structure.The micro fresnel lens array differs requirement because its relief depth only satisfies 2 π to a certain wavelengths, and its commplementary wave length is not satisfied, so there is serious diffraction aberration problem in the micro fresnel lens array.In addition, because the position quantizes mutually, also can cause the loss of diffraction efficiency.These defectives are restricted the application of micro fresnel lens array.

Hot melt refractive micro lens array is because manufacture craft restriction, forms between each single-element lens of its lens array and has bigger dead band.The defective of this refractive micro lens array is that the energy in dead band not only is not utilized, and causes bigger ground unrest on the contrary.And the shape of its single-element lens is subjected to process technology limit, the semisphere that generally is as the criterion, and can not make image quality other shape preferably, so the image quality of refractive micro lens array is restricted.

The purpose of this utility model is to overcome the deficiencies in the prior art and a kind of micro lens array with continuous surface embossment pattern that does not have dead band, good, the no diffraction aberration of picture element is provided.

The purpose of this utility model can realize by following technical measures: form micro lens array by substrate and a plurality of lenticules unit on it, the surface of each lenticule unit is a continuous curve surface, do not have the gap between the adjacent lenticule unit, the micro lens array surface is a continuous relief.

The purpose of this utility model also can realize by following technical measures: the surface of forming each lenticule unit of micro lens array is convex parabola or spill parabola.

The utility model compared with prior art has following advantage: because micro lens array of the present utility model is very close to each other between each lenticule unit, so there is not the dead band, therefore have bigger fill factor, curve factor; Micro lens array has continuous surface relief structure, has eliminated quantizing noise, makes diffraction efficiency obtain large increase, and has eliminated the diffraction aberration.The single-element lens of micro lens array has aspherical shape, and image quality is near diffraction limit.

Micro lens array of the present utility model has no diffraction aberration and high energy utilization rate characteristic because of it, all has in many fields such as infrared optics, photometry calculation, light interconnection, optical communication and even micro-system science extensively and important application prospects.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the structural drawing of the micro lens array of the utility model embodiment 1.

Fig. 2 is the sectional view of the microlens array structure figure of the utility model embodiment 1.

Fig. 3 is the structural drawing of the micro lens array of the utility model embodiment 2.

Fig. 4 is the sectional view of the microlens array structure figure of the utility model embodiment 2.

As shown in Figure 1, the micro lens array of embodiment 1 is made up of substrate 2 and a plurality of lenticules unit 1 on it.Do not have the gap between the adjacent lenticule unit 1, do not have the dead band.The micro lens array surface that a plurality of lenticules unit 1 forms is a continuous relief, and its embossment has certain depth.The surface of forming each lenticule unit 1 of continuous relief micro lens array is the convex parabola.Figure 2 shows that the cross section of continuous relief micro lens array.

As shown in Figure 3, the micro lens array of embodiment 2 is made up of substrate 4 and a plurality of lenticules unit 3 on it.Do not have the gap between the adjacent lenticule unit 3, do not have the dead band.The micro lens array surface that a plurality of lenticules unit 3 forms is a continuous relief, and its embossment has certain depth.The surface of forming each lenticule unit 3 of continuous relief micro lens array is the spill parabola.Figure 4 shows that the cross section of continuous relief micro lens array.

Claims

1, a kind of micro lens array is made up of substrate (2) and a plurality of lenticules unit (1) on it, it is characterized in that: do not have the gap between each adjacent lenticule unit (1), the micro lens array surface of formation is a continuous relief.

2, according to claim 1 described micro lens array, it is characterized in that: each lenticule unit of forming micro lens array is convex lens (1) both, also concave mirror.