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Reflective beam concentrator
| Details |
Inventors: Clegg, John E.;
Assignee:
Primary Examiner: Corbin; John K.
Assistant Examiner: Gass; Rebecca D.
Attorney, Agent or Firm:
The disclosure is an optical instrument which produces a concentrated beam of light by reducing the size of an incipient beam. An annular incipient solar beam is reflected inward to a concave conical lens which refracts the beam out of the lens in a direction parallel to the incipient beam. The concentrated beam is composed of parallel rays of coherent light similar to the laser beam. |
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DETAILED DESCRIPTION I claim: 1.
A reflective beam concentrator consisting of an annular concave mirror and a conical lens mounted inside a casing and aligned on a common axis which is parallel to light rays entering and exiting the concentrator, with all surfaces of the mirror and lens not used for the reflection, transmission and refraction of light rays being opaque; (a) with the annular concave conical mirror having a concave reflective surface which receives parallel solar rays and reflects these rays inward to the conical lens, (b) with the conical lens having a convex conical section which receives parallel rays reflected from the concave reflective surface of the annular concave conical mirror and transmits these rays in a straight line through the conical lens, (c) with the conical lens having a concave conical section which receives parallel rays transmitted from the convex conical section of the conical lens and refracts these rays out of the conical lens in a direction parallel to the common axis of the annular concave conical mirror and conical lens.
Description:
BACKGROUND OF THE INVENTION The invention relates to optical instruments, specifically to beam concentrators which reduce the size of beams of light by reflection and refraction.
Prior art includes the spherical magnifying lens which produces convergent beams by focusing rays to a point and four beam concentrators invented by the applicant: Conical Split-Image Microscopic Lens, Patent Application Ser.
No.
06/209,865, dated Nov.
24, 1980 now U.
S.
Pat.
No.
4,277,148; Prismatic Beam Concentrator, application Ser.
No.
254,953, filed Apr.
4, 1981 now abandoned; and Conical Beam Concentrator, application Ser.
No.
260,593, filed May 6, 1981.
SUMMARY OF THE INVENTION The reflective beam concentrator is unique and superior to the concentrators listed above in that it uses a relatively wide concave conical mirror which reflects an annular solar beam inward to a conical lens to produce beams of high intensity.
(Intensity is the quotient of the area of the incipient beam divided by the area of the concentrated beam
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