CN103885163A

CN103885163A - Focus changeable Fresnel lens system

Info

Publication number: CN103885163A
Application number: CN201410150153.4A
Authority: CN
Inventors: 盖志武
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-06-09
Filing date: 2014-04-15
Publication date: 2014-06-25
Also published as: CN103278917A; CN203930192U

Abstract

A focus changeable Fresnel lens system can change focus positions after condensation of Fresnel lenses effectively to meet various requirements for condensation through Fresnel lenses and focus positions in engineering. Plane mirrors are arranged between the Fresnel lenses and focuses of the Fresnel lenses. Due to the reflection of the plane mirrors, the light ray direction after condensation of the Fresnel lenses are changed, and the focus positions after condensation of the Fresnel lenses are changed. The focus positions are changed if the positions and the angles of the plane mirrors are changed, so that the system can meet engineering requirements of various places. By means of the system, the problems of inconveniences to some application places and even low efficiency or waste of prior Fresnel lenses and effects on effective development and sufficient usage of the solar energy due to fixed and unchanged focuses of prior Fresnel lenses are solved.

Description

Variable-focus Fresnel Lenses system

The application's request: application number 201310228638.6, on June 9 2013 applying date, denomination of invention is the right of priority of the application for a patent for invention of variable-focus Fresnel Lenses system.

Technical field

The present invention relates to a kind of variable-focus Fresnel Lenses system, can change the focal position after Fresnel Lenses optically focused, to meet the requirement that uses Fresnel Lenses optically focused and focusing position in engineering.

Background technology

Fresnel Lenses is widely used in photovoltaic, photo-thermal system, but the focus of existing Fresnel Lenses is changeless, this makes troubles and even causes inefficiency or waste to some application scenario, has affected the effective exploitation of sun power and has made full use of.Develop a kind of variable-focus Fresnel Lenses system to solve problems for this reason.

Summary of the invention

The focus the object of the invention is for solving existing existing Fresnel Lenses immobilizes, and makes troubles to some application scenario and even causes inefficiency or waste, and impact is to the effective exploitation of sun power and the problem making full use of.

The present invention includes: Fresnel Lenses, former focus, this variable-focus Fresnel Lenses system also comprises level crossing, normal, the focus after the transfer on normal; Level crossing is parallel with Fresnel Lenses, when directional light is along the direction that is parallel to normal, after the vertical incidence of Fresnel Lenses top, due to the reflection of level crossing, makes the focus after Fresnel Lenses optically focused become the focus after the transfer on the normal on normal.

When described level crossing slides in the direction perpendicular to normal, the focus after the transfer on normal is also slided on normal.

Described variable-focus Fresnel Lenses system also comprises the focus after the transfer of off-normal; Level crossing and normal acutangulate or when obtuse angle, due to the reflection of level crossing, make focus after the Fresnel Lenses optically focused focus after former focus becomes the transfer of off-normal.

Between Fresnel Lenses and its focus, level crossing is set, due to the reflection of level crossing, change the radiation direction after Fresnel Lenses optically focused, focal position after Fresnel Lenses optically focused is changed, change position and the angle of level crossing, focal position is corresponding change also, to meet the requirement of engineering of different occasions.

The present invention can change or regulate the focal position after Fresnel Lenses optically focused, to meet the various requirement that uses Fresnel Lenses optically focused and focusing position in engineering, effectively improves the development and utilization effect to sun power.

Brief description of the drawings

Fig. 1 represents the first embodiment schematic diagram of the present invention;

In figure: level crossing is vertical with normal.

Fig. 2 represents the second embodiment schematic diagram of the present invention;

In figure: level crossing and normal acutangulate or obtuse angle.

Embodiment

Below embodiments of the invention are elaborated, the present embodiment is implemented under taking technical solution of the present invention as prerequisite, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.

Embodiment 1

As shown in Figure 1, the variable-focus Fresnel Lenses system of the present embodiment, comprises Fresnel Lenses 1, former focus 3, and this variable-focus Fresnel Lenses system also comprises the level crossing parallel with Fresnel Lenses 12, normal 4, the focus 5 after the transfer on normal; When directional light is along the direction that is parallel to normal 4, after Fresnel Lenses 1 top vertical incidence, due to the reflection of level crossing 2, make the focus after Fresnel Lenses 1 optically focused become the focus 5 after the transfer on the normal on normal 4, instead of former focus 3.

Embodiment 2

As shown in Figure 1, in the variable-focus Fresnel Lenses system of the present embodiment, when level crossing 2 is in the time that the direction perpendicular to normal 4 is slided, the focus 5 after the transfer on normal is also slided on normal 4; Focus 5 sliding scales after transfer are between former focus 3 and Fresnel Lenses 1.

Embodiment 3

As shown in Figure 2, also comprise the focus 6 after the transfer of off-normal in the variable-focus Fresnel Lenses system of the present embodiment.Level crossing 2 acutangulates with normal 4 or when obtuse angle, due to the reflection of level crossing 2, makes focus after the Fresnel Lenses 1 optically focused focus 6 after former focus 3 becomes the transfer of off-normal; Focus 6 off-normal 4 after the transfer of off-normal, position and the Angular correlation of concrete side-play amount and level crossing 2.

The variable-focus Fresnel Lenses system of the present embodiment adopts simple and with low cost level crossing to change the focal position after fourth Fresnel Lenses optically focused, can meet the requirement of engineering of different occasions, effectively improve the development and utilization effect to sun power, expand the application space of sun power.

Claims

1. a variable-focus Fresnel Lenses system, comprise Fresnel Lenses (1), former focus (3), it is characterized in that: this variable-focus Fresnel Lenses system also comprises level crossing (2), normal (4), the focus (5) after the transfer on normal; Level crossing (2) is parallel with Fresnel Lenses (1), when directional light is along the direction that is parallel to normal (4), after the vertical incidence of Fresnel Lenses (1) top, due to the reflection of level crossing (2), make the focus after Fresnel Lenses (1) optically focused become the focus (5) after the transfer on the normal on normal (4).

2. variable-focus Fresnel Lenses system according to claim 1, it is characterized in that, when described level crossing (2) slides in the direction perpendicular to normal (4), the focus (5) after the transfer on normal is also in the upper slip of normal (4).

3. variable-focus Fresnel Lenses system according to claim 1, is characterized in that, described variable-focus Fresnel Lenses system also comprises the focus (6) after the transfer of off-normal; Level crossing (2) and normal (4) acutangulate or when obtuse angle, due to the reflection of level crossing (2), make focus after Fresnel Lenses (1) the optically focused focus (6) after former focus (3) becomes the transfer of off-normal.