Method for a solar concentrator manufacturing

• US 4,691,994 A
• Filed: 10/06/1981
• Issued: 09/08/1987
• Est. Priority Date: 10/06/1981
• Status: Expired due to Fees

• Current Assignee: Albert V. Vartanian, Dmitry S. Strebkov, Eduard V. Tveryanovich, Ruben G. Martirosian, Stanislav V. Ryabikov, Viktor V. Afian
• Original Assignee: Albert V. Vartanian, Dmitry S. Strebkov, Eduard V. Tveryanovich, Ruben G. Martirosian, Stanislav V. Ryabikov, Viktor V. Afian
• Inventors: Strebkov, Dmitry S., Martirosian, Ruben G., Ryabikov, Stanislav V., Afian, Viktor V., Vartanian, Albert V., Tveryanovich, Eduard V.
• Primary Examiner(s): ARNOLD, BRUCE
• Application Number:
  US06/309,044
• Time in Patent Office: 2,163 Days
• Field of Search: 136/214, 126/440, 126/451, 350/3.6, 350/3.7, 350/286, 350/3.83, 350/96.12, 350/96.13, 350/96.14, 350/96.19, 350/320, 250/563, 250/227, 250/228, 356/431
• US Class Current: 359/15
• CPC Class Codes: F24S 23/10 Prisms
• CPC Class Codes: G02B 5/32 Holograms used as optical elements
• CPC Class Codes: G03H 1/0408 Total internal reflection [TIR] holograms, e.g. edge lit or substrate mode holograms
• CPC Class Codes: G03H 2001/0439 for recording Holographic Optical Element [HOE] HOE per se G02B5/32
• CPC Class Codes: H01L 31/0547 comprising light concentrating means of the reflecting type, e.g. parabolic mirrors, concentrators using total internal reflection
• CPC Class Codes: Y02E 10/40 Solar thermal energy, e.g. solar towers
• CPC Class Codes: Y02E 10/52 PV systems with concentrators
• CPC Class Codes: Y10S 359/90 Methods

Abstract

A method of manufacturing a solar concentrator employing a prism having a radiation input face, a reflection face and at least one radiation output face. The method comprises the steps of providing the prism with its reflection face angularly disposed with respect to the input face. A layer of light-sensitive material is deposited on the input face of the prism. An auxiliary prism and a substance having a refractive index close to that of the light-sensitive material is provided with the substance placed between the light-sensitive material and the auxiliary prism. Next, an interference pattern is recorded in the light-sensitive layer to obtain a three dimensional hologram. This is accomplished by using a reference laser beam and an object laser beam. The reference laser beam is sent to the light-sensitive layer via the auxiliary prism and the substance in the direction of propagation of the incident radiation to be concentrated. The object laser beam is directed via the auxiliary prism at an angle with respect to the light-sensitive layer such that fringe planes are formed in the light-sensitive layer in order to diffract incident radiation at the angle. The auxiliary prism and the substance are removed, and the light-sensitive layer is developed. The angular relationship between the reflection face, the input face and the angle are chosen to preclude the diffraction of a beam which has been reflected from the reflection face.

Claims

1. A method of manufacturing a solar concentrator employing a prism having a radiation input face, a reflection face and at least one radiation output face, said method comprising the steps of:

providing said prism with said reflection face angularly disposed with respect to said input face;

depositing a layer of light-sensitive material on said input face of the prism;

providing an auxiliary prism and a substance having a refractive index close to that of said light-sensitive material and placing said substance between said light-sensitive material and said auxiliary prism;

recording an interference pattern to obtain a three dimensional hologram in said light-sensitive layer by the use of a reference laser beam and an object laser beam by sending said reference laser beam to said light-sensitive layer via said auxiliary prism and said substance in the direction of propagation of the incident radiation to be concentrated and by directing said object laser beam via said auxiliary prism at an angle with respect to said light-sensitive layer such that fringe planes are formed therein in order to diffract said incident radiation at said angle;

removing said auxiliary prism and said substance; and

developing said light-sensitive layer;

wherein the angular relationship between said reflection face, said input face and said angle are chosen to preclude the diffraction of a beam which has been reflected from said reflection face.

2. A method of manufacturing a solar concentrator as claimed in claim 1, wherein said prism has a trapezoidal base and said object laser beam is light radiation with a flat wave-front, which is directed to one of said faces of said prism which act as said radiation input and reflection faces.