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Focus changeable Fresnel lens system

A technology of Fresnel lens and focus, applied in the field of variable focus Fresnel lens system, can solve the problems that affect the effective development and full utilization of solar energy, fixed focus, waste, etc., and achieve the effect of improving the effect of development and utilization

Inactive Publication Date: 2014-06-25
盖志武
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the focus of the existing Fresnel lens is fixed, which brings inconvenience to some application occasions, even leads to low efficiency or waste, and affects the effective development and full utilization of solar energy

Method used

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  • Focus changeable Fresnel lens system
  • Focus changeable Fresnel lens system

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Such as figure 1 As shown, the variable focus Fresnel lens system of the present embodiment includes a Fresnel lens 1 and an original focal point 3. The variable focus Fresnel lens system also includes a plane mirror 2 parallel to the Fresnel lens 1. Line 4, the shifted focal point 5 on the normal line; when the parallel light is incident vertically on the top of Fresnel lens 1 along the direction parallel to the normal line 4, due to the reflection of the plane mirror 2, the Fresnel lens 1 concentrates light The subsequent focus becomes the shifted focus 5 on the normal on the normal 4 instead of the original focus 3.

Embodiment 2

[0019] Such as figure 1 As shown, in the variable focus Fresnel lens system of the present embodiment, when the plane mirror 2 slides in the direction perpendicular to the normal 4, the shifted focus 5 on the normal also slides on the normal 4; The sliding range of the rear focus 5 is between the original focus 3 and the Fresnel lens 1 .

Embodiment 3

[0021] Such as figure 2 As shown, the variable focus Fresnel lens system in this embodiment also includes a shifted focal point 6 that deviates from the normal. When the plane mirror 2 forms an acute or obtuse angle with the normal 4, due to the reflection of the plane mirror 2, the focal point after the Fresnel lens 1 gathers light changes from the original focal point 3 to the shifted focal point 6 deviated from the normal; the shift from the normal The rear focal point 6 deviates from the normal 4, and the specific amount of deviation is related to the position and angle of the plane mirror 2.

[0022] The variable focus Fresnel lens system of this embodiment adopts a simple and low-cost plane mirror to change the focus position after the Fresnel lens condenses light, which can meet the engineering needs of different occasions and effectively improve the development and utilization of solar energy. Expand the application space of solar energy.

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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

[0001] This application requests: application number 201310228638.6, application date June 9, 2013, priority of the invention patent application titled variable focus Fresnel lens system. technical field [0002] The invention relates to a variable focal point Fresnel lens system, which can change the focus position of the Fresnel lens after condensing light, so as to meet the requirements of using the Fresnel lens for light condensing and focus position in engineering. Background technique [0003] Fresnel lenses are widely used in solar photovoltaic and photothermal systems. However, the focus of existing Fresnel lenses is fixed, which brings inconvenience to some applications and even leads to inefficiency or waste. Effective development and full utilization of solar energy. A variable focus Fresnel lens system was developed to solve such problems. Contents of the invention [0004] The purpose of the present invention is to solve the problem that the focus of the exis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B19/00G02B26/08
Inventor 盖志武
Owner 盖志武