GB989649A - Optical apparatus - Google Patents
Optical apparatusInfo
- Publication number
- GB989649A GB989649A GB3141162A GB3141162A GB989649A GB 989649 A GB989649 A GB 989649A GB 3141162 A GB3141162 A GB 3141162A GB 3141162 A GB3141162 A GB 3141162A GB 989649 A GB989649 A GB 989649A
- Authority
- GB
- United Kingdom
- Prior art keywords
- optical
- moirú
- fringes
- small angle
- grating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000003287 optical effect Effects 0.000 title abstract 5
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/36—Forming the light into pulses
- G01D5/38—Forming the light into pulses by diffraction gratings
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
989,649. Optical apparatus. G. S. K. WONG. Nov. 15,1963 [Aug. 16,1962], No. 31411/62. Heading G2J. A member M, whose linear displacement is to be measured, is rigidly connected to an optical plate O having a front silvered surface S adjacent a second optical flate O<SP>1</SP> of clear glass inclined at a small angle and thereto so that an interference fringe pattern may be formed by monochromatic light from source T, the interference pattern being observed through a grating G so that MoirÚ fringes are seen. The grating placed on the surface of optical flat O<SP>1</SP>, with its rulings set at a small angle to the bands of the interference fringe pattern, and the MoirÚ fringes may be counted by photoelectric cell P, amplifier A and electronic decade counter K.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3141162A GB989649A (en) | 1962-08-16 | 1962-08-16 | Optical apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3141162A GB989649A (en) | 1962-08-16 | 1962-08-16 | Optical apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB989649A true GB989649A (en) | 1965-04-22 |
Family
ID=10322715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3141162A Expired GB989649A (en) | 1962-08-16 | 1962-08-16 | Optical apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB989649A (en) |
-
1962
- 1962-08-16 GB GB3141162A patent/GB989649A/en not_active Expired
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