Fresnel lens system with superposed focuses
A technology of Fresnel lens and focus, applied in the field of Fresnel lens system, can solve the problems that affect the effective development and full utilization of solar energy, the focus is fixed and cannot be satisfied, and achieve the effect of improving the effect of development and utilization
Inactive Publication Date: 2013-10-02
盖志武
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Problems solved by technology
[0003] The purpose of the present invention is to solve the problem that the focus of the existing Fresnel lens is fixed and the focus light intensity is limited, which brings inconvenience to some applications and even leads to low efficiency or waste, and cannot meet the requirements of some engineering practices. , issues affecting the effective development and full utilization of solar energy
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specific Embodiment approach 2
[0012] The Fresnel lens system of focus superimposition of the present invention also comprises the 2nd Fresnel lens 8, the 4th focal point 6, the 2nd plane mirror 7, the 3rd focal point 5; After incident, due to the reflection of the second plane mirror 7 , the focal point after the second Fresnel lens 8 is collected changes from the fourth focal point 6 to the third focal point 5 .
specific Embodiment approach 3
[0013] In the focus superposition Fresnel lens system of the present invention, by adjusting the first plane mirror 2 and the second plane mirror 7, the second focal point 4 and the third focal point 5 can be close to or coincident, thereby increasing the light intensity in this area, which can Reach 2 times or more than 2 times the light intensity of a single focus.
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The invention provides a Fresnel lens system with superposed focuses, which is capable of adjusting and changing the focus positions of a Fresnel lens after condensation, so that two or more focal spots are coincided or superposed, the light intensity of the superposed region is multiplied, and the requirement of Fresnel lens condensation and high light intensity in engineering practice to be met accordingly. A plane mirror is arranged between each Fresnel lens and the focus thereof, the reflection of the plane mirror changes the light ray direction of the Fresnel lens after condensation, and enable the focus position of the Fresnel lens after condensation to be changed. The change of the position and angle of the plane mirror causes corresponding change of the position of the focus, the adjusting of the focus position is capable of enabling two or more focal spots to be superposed, and the position of the superposed spots to be adjusted correspondingly. The Fresnel lens system provided by the invention effectively solves the problems that the conventional Fresnel lens focus is constant and the light intensity of the focus is insufficient, which cause inconvenience to certain application occasions and even causes low efficiency or waste, or requirements of certain engineering practices can not be satisfied, so as to affect effective exploitation and sufficient utilization of solar energy.
Description
technical field [0001] The present invention relates to a focus superposition Fresnel lens system, which is composed of two or more Fresnel lenses, which can change the focus position of each Fresnel lens after light collection, so that two or more focus spots overlap Or superimposed, so that the light intensity of the superimposed area is doubled, so as to meet the requirements of using Fresnel lens to concentrate light and high light intensity in engineering practice. Background technique [0002] Fresnel lenses are widely used in solar photovoltaic and photothermal systems. However, the focus of existing Fresnel lenses is fixed, or the focus light intensity is limited, which brings inconvenience to some applications and even leads to low efficiency. Or waste, can not meet the requirements of some engineering practices, affecting the effective development and full utilization of solar energy. For this reason, a variable focal point superimposed Fresnel lens system is deve...
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IPC IPC(8): G02B19/00
Inventor 盖志武
Owner 盖志武