FR2262322B1 - - Google Patents
Info
- Publication number
- FR2262322B1 FR2262322B1 FR7505497A FR7505497A FR2262322B1 FR 2262322 B1 FR2262322 B1 FR 2262322B1 FR 7505497 A FR7505497 A FR 7505497A FR 7505497 A FR7505497 A FR 7505497A FR 2262322 B1 FR2262322 B1 FR 2262322B1
- Authority
- FR
- France
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
- G01J1/20—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle
- G01J1/22—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using a variable element in the light-path, e.g. filter, polarising means
- G01J1/24—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using a variable element in the light-path, e.g. filter, polarising means using electric radiation detectors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/02—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Optics & Photonics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Diaphragms For Cameras (AREA)
- Transmission Devices (AREA)
- Spectrometry And Color Measurement (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US445246A US3893753A (en) | 1974-02-25 | 1974-02-25 | Optical attenuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2262322A1 FR2262322A1 (US07576130-20090818-C00114.png) | 1975-09-19 |
| FR2262322B1 true FR2262322B1 (US07576130-20090818-C00114.png) | 1977-04-15 |
Family
ID=23768148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7505497A Expired FR2262322B1 (US07576130-20090818-C00114.png) | 1974-02-25 | 1975-02-21 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3893753A (US07576130-20090818-C00114.png) |
| CH (1) | CH591686A5 (US07576130-20090818-C00114.png) |
| FR (1) | FR2262322B1 (US07576130-20090818-C00114.png) |
| GB (1) | GB1433735A (US07576130-20090818-C00114.png) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5981520A (ja) * | 1982-10-30 | 1984-05-11 | Shimadzu Corp | 分光器スリツト機構 |
| US4904044A (en) * | 1988-09-08 | 1990-02-27 | Light Control Systems, Inc. | Continuously variable fiber optic attenuator |
| US4989938A (en) * | 1988-09-08 | 1991-02-05 | Light Control Systems, Inc. | Continuously variable fiber optic attenuator |
| US5109468A (en) * | 1990-05-08 | 1992-04-28 | M/A-Com Light Control Systems, Inc. | Fixed value fiber optic attenuator |
| US6456775B1 (en) * | 2001-04-05 | 2002-09-24 | General Instrument Corporation | Optical fiber attenuator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1003536A (en) * | 1910-06-30 | 1911-09-19 | M C Spinks | Photograph-shutter. |
| US2041465A (en) * | 1932-07-09 | 1936-05-19 | Ig Farbenindustrie Ag | Device for obturating multicolor filters |
-
1974
- 1974-02-25 US US445246A patent/US3893753A/en not_active Expired - Lifetime
-
1975
- 1975-02-07 GB GB525175A patent/GB1433735A/en not_active Expired
- 1975-02-20 CH CH210475A patent/CH591686A5/xx not_active IP Right Cessation
- 1975-02-21 FR FR7505497A patent/FR2262322B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1433735A (en) | 1976-04-28 |
| DE2507913A1 (de) | 1975-09-04 |
| US3893753A (en) | 1975-07-08 |
| FR2262322A1 (US07576130-20090818-C00114.png) | 1975-09-19 |
| DE2507913B2 (de) | 1976-09-16 |
| CH591686A5 (US07576130-20090818-C00114.png) | 1977-09-30 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |