Monolithic Geared Optical Reflector

• US 20120140219A1
• Filed: 12/07/2010
• Published: 06/07/2012
• Est. Priority Date: 12/07/2010
• Status: Abandoned Application

• Current Assignee: Thermo Electron Scientific Instruments LLC (Thermo Fisher Scientific Incorporated)
• Original Assignee: Thermo Electron Scientific Instruments LLC (Thermo Fisher Scientific Incorporated)
• Inventors: CLEARY, Joseph A.
• Application Number:
  US12/962,509
• Publication Number:
  US 20120140219A1
• Time in Patent Office: Days
• US Class Current: 356/323
• CPC Class Codes: G01J 3/0202 Mechanical elements; Supports for optical elements
• CPC Class Codes: G01J 3/021 using plane or convex mirrors, parallel phase plates, or particular reflectors
• CPC Class Codes: G01J 3/0237 Adjustable, e.g. focussing
• CPC Class Codes: G02B 26/0816 by means of one or more reflecting elements

Abstract

A novel monolithic geared optical reflector apparatus which is configured from a gear blank machined to have an integral shaft and integral reflective surface with desired optical properties is introduced herein. Such a rotating mirror device is beneficially capable of being configured into any optical instrument, such as, but not limited to a spectrophotometer, wherein the reflector is adapted to accurately point to a plurality of locations within or out of the system via gear to gear rotation.

Claims

1. A monolithic geared reflector comprising:

a substrate having an integrally configured first circular cross-section, said first circular cross-section being additionally integrally configured with an annular plurality of gear teeth;

a shaft having a second circular cross-section integrally configured out of a first end of said substrate, wherein said shaft is adapted to rotate about its axis;

an optical reflective surface integrally configured from and along a second end of said annular substrate; and

wherein said annular plurality of gear teeth are adapted to cooperate with a mating gear so as to rotate said shaft and direct optical radiation to a plurality of predetermined locations in and out of a coupled spectrophotometer instrument upon being received by said integrally configured optical reflective surface.

2. The monolithic geared reflector of claim 1, wherein said optical reflective surface comprises at least one surface selected from:

an elliptical surface, a spherical surface, a parabolic surface, a toroidal surface, and a flat surface.

3. The monolithic geared reflector of claim 2, wherein said optical reflective surface is configured to provide a full angular reflection of 10 degrees up to about 120 degrees.

4. The monolithic geared reflector of claim 1, wherein said monolithic geared reflector is configured out a single stock material, said material being at least one selected from:

metal, plastic, nylon, and Delrin.

5. The monolithic geared reflector of claim 4, wherein said monolithic geared reflector is configured out of 6061-T6 aluminum.

6. The monolithic geared reflector of claim 1, wherein said optical reflective surface further comprises an optical reflective coating deposited on said optical reflective surface.

7. The monolithic geared reflector of claim 1, wherein said optical reflective surface further comprises an optical protective coating deposited on said optical reflective surface.

8. The monolithic geared reflector of claim 1, wherein said annular plurality of gear teeth is integrally configured into said first circular cross-section having a width of at least 1/10th of an inch.

9. The monolithic geared reflector of claim 1, wherein said annular plurality of gear teeth in combination with said adapted mating gear comprises at least one gearing combination selected from:

a spur gear system, a rack and pinion gear system, a worm gear system, and a planetary gear system.

10. A geared reflector system, comprising:

a housing;

a monolithic geared reflector disposed within said housing, said reflector further comprising;

a) a substrate having an integrally configured first circular cross-section, said first circular cross-section being additionally integrally configured with an annular plurality of gear teeth;

b) a shaft having a second circular cross-section integrally configured out of a first end of said substrate, wherein said shaft is adapted to rotate about its axis; and

c) an optical reflective surface integrally configured from and along a second end of said annular substrate;

one or more sources and/or one or more detectors arranged in said housing to be annularly configured about said monolithic geared reflector; and

a mating gear configured to engage said annular plurality of gear teeth and adapted to rotate said shaft so as to direct received predetermined optical radiation at said optical reflective surface to said annularly configured one or more detectors or to receive predetermined optical radiation at said optical reflective surface from said annularly configured one or more sources so as to further direct the predetermined optical radiation out of said housing.

11. The geared reflector system of claim 10, wherein said optical reflective surface comprises at least one surface selected from:

an elliptical surface, a parabolic surface, a spherical surface, a toroidal surface, and a flat surface.

12. The geared reflector system of claim 10, wherein said system further comprises one or more detents or sensors to enable locating positions for said monolithic geared reflector.

13. The geared reflector system of claim 10, wherein said reflector is configured with a reflectivity of at least 90% for predetermined bands of optical radiation ranging from the ultra-violet (UV) up to the far-infrared (Far-IR).

14. The geared reflector system of claim 10, wherein said one or more sources comprises at least one source selected from:

a lamp, a heated source, an LED, a nitride source, and a monochromatic source.

15. The geared reflector system of claim 10, wherein said one or more detectors comprises at least one detector selected from:

a photodiode, a charge coupled device (CCD), a liquid nitrogen cooled CCD camera, a two-dimensional array detector, an avalanche CCD photodetector, a photomultiplier, and a photodiode capable of point by point scanning.