JPS5458453A - Light attenuator - Google Patents
Light attenuatorInfo
- Publication number
- JPS5458453A JPS5458453A JP12468177A JP12468177A JPS5458453A JP S5458453 A JPS5458453 A JP S5458453A JP 12468177 A JP12468177 A JP 12468177A JP 12468177 A JP12468177 A JP 12468177A JP S5458453 A JPS5458453 A JP S5458453A
- Authority
- JP
- Japan
- Prior art keywords
- light
- evaporated
- glass plate
- optical lens
- attenuator
- 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.)
- Pending
Links
Abstract
PURPOSE: To achieve the improvement in the quality of the attenuator by letting transmitted light be absorbed by the utilization of the reflected light of the metal plate evaporated on a glass plate thereby preventing the entry of reverse light to the incident side.
CONSTITUTION: A glass plate 1 evaporated with a metal film 2 as a reflection type light attenuation plate is disposed on the front surface of the optical lens 4 coupled to an optical transmission line 3 and a light absorber 5 is provided therebehind. The light P1 incident from the optical fiber 3 end becomes parallel beams through an optical lens 4 and the beams fall onto the metal film 2 evaporated on the glass plate 1. Part of the light reflects and is again focused by the optical lens 4 and enters the optical fiber 3 end as light P3. Since the attenuator is formed by making use of the reflected light in this way and the transmitted light is also absorbed in the absorber 5, no inconveniences will occur
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12468177A JPS5458453A (en) | 1977-10-18 | 1977-10-18 | Light attenuator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12468177A JPS5458453A (en) | 1977-10-18 | 1977-10-18 | Light attenuator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5458453A true JPS5458453A (en) | 1979-05-11 |
Family
ID=14891429
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12468177A Pending JPS5458453A (en) | 1977-10-18 | 1977-10-18 | Light attenuator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5458453A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5745634A (en) * | 1996-07-24 | 1998-04-28 | Jds Fitel Inc. | Voltage controlled attenuator |
-
1977
- 1977-10-18 JP JP12468177A patent/JPS5458453A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5745634A (en) * | 1996-07-24 | 1998-04-28 | Jds Fitel Inc. | Voltage controlled attenuator |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS57135534A (en) | Transmitter and receiver for space traveling light | |
JPS5458453A (en) | Light attenuator | |
JPS57109481A (en) | Transmission type video projector | |
JPS5488136A (en) | Optical branching filter for optical fibers | |
JPS56106211A (en) | Thick-film lens with optical filter | |
JPS5420750A (en) | Photo coupler | |
JPS5545062A (en) | Light attenuator | |
JPS5535354A (en) | Semiconductor laser beam branching device | |
JPS5612629A (en) | Blade for exposure control | |
JPS5521077A (en) | Photo switch | |
JPS6449930A (en) | Multiple reflection cell | |
JPS5538520A (en) | Reflection-refraction type telephoto lens | |
JPS57190919A (en) | Optical multiplexer and demultiplexer | |
JPS5748710A (en) | Optical wave branching filter | |
JPS5317351A (en) | Optical filter | |
JPS5546703A (en) | Photo multiple distributor | |
JPS5449153A (en) | Light attenuator | |
JPS5720704A (en) | Apparatus for light branching circuit | |
JPS5589721A (en) | Evaluation method for connection loss of optical cable | |
JPS54118184A (en) | Luminous element with optical fiber | |
JPS57129037A (en) | Optical transmission device | |
JPS5487492A (en) | Coupler between semiconductor laser and optical fiber | |
JPS5727227A (en) | Optical separator | |
JPS5364532A (en) | Photo attenuator | |
JPS57167001A (en) | Construction of optical curved mirror surface body |