JPS6482012A - Lens with dew condensation heater control - Google Patents
Lens with dew condensation heater controlInfo
- Publication number
- JPS6482012A JPS6482012A JP24215687A JP24215687A JPS6482012A JP S6482012 A JPS6482012 A JP S6482012A JP 24215687 A JP24215687 A JP 24215687A JP 24215687 A JP24215687 A JP 24215687A JP S6482012 A JPS6482012 A JP S6482012A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- conductor
- dew condensation
- control
- vapor
- 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
- 230000005494 condensation Effects 0.000 title abstract 3
- 238000009833 condensation Methods 0.000 title abstract 3
- 239000004020 conductor Substances 0.000 abstract 4
- 238000001514 detection method Methods 0.000 abstract 3
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000007740 vapor deposition Methods 0.000 abstract 1
Landscapes
- Optical Couplings Of Light Guides (AREA)
- Laser Beam Processing (AREA)
Abstract
PURPOSE:To suppress dew condensation on a lens surface due to environmental variation by vapor-deposition a conductor which has large electric resistance on the outer peripheral part of a lens and supplying a current to the conductor with the signal of a temperature sensor. CONSTITUTION:The conductor 2 which has large electric resistance is vapor- deposited on the outer periphery of the lens 1 except part of it, and its coupling part is connected to a control circuit 8 through the conductor 3. Further, a temperature detection sensor 5 is fitted to the lens 1 and connected to a circuit part 8 together with a temperature detection sensor 6 for outside air. Then detection signals from the sensors 5 and 6 are inputted to the control part 8 to control the switching of a current supplied between terminal parts 3a and 3b according to the temperature difference between the lens 1 and outside air. Consequently, the lens is prevented from being stained owing to dew condensation on the lens surface to receive and project laser light, etc., stably.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24215687A JPS6482012A (en) | 1987-09-25 | 1987-09-25 | Lens with dew condensation heater control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24215687A JPS6482012A (en) | 1987-09-25 | 1987-09-25 | Lens with dew condensation heater control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6482012A true JPS6482012A (en) | 1989-03-28 |
Family
ID=17085159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24215687A Pending JPS6482012A (en) | 1987-09-25 | 1987-09-25 | Lens with dew condensation heater control |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6482012A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06114100A (en) * | 1992-10-04 | 1994-04-26 | Shigenobu Takane | Dental pump |
| TWI408487B (en) * | 2007-03-20 | 2013-09-11 | Casio Computer Co Ltd | Projector apparatus, projection control method and recording medium storing projection control program |
-
1987
- 1987-09-25 JP JP24215687A patent/JPS6482012A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06114100A (en) * | 1992-10-04 | 1994-04-26 | Shigenobu Takane | Dental pump |
| TWI408487B (en) * | 2007-03-20 | 2013-09-11 | Casio Computer Co Ltd | Projector apparatus, projection control method and recording medium storing projection control program |
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