TWM387986U - Optical angular measuring apparatus - Google Patents
Optical angular measuring apparatusInfo
- Publication number
- TWM387986U TWM387986U TW099208058U TW99208058U TWM387986U TW M387986 U TWM387986 U TW M387986U TW 099208058 U TW099208058 U TW 099208058U TW 99208058 U TW99208058 U TW 99208058U TW M387986 U TWM387986 U TW M387986U
- Authority
- TW
- Taiwan
- Prior art keywords
- light beam
- waveplate
- polarized light
- reflective mirror
- pbs
- Prior art date
Links
Landscapes
- Length Measuring Devices By Optical Means (AREA)
Abstract
An optical angular measuring apparatus includes a reflective mirror, a light source, a 1/4 waveplate, a polarizing beamsplitter (PBS) and a photo sensor. The light source is adapted to provide a light beam, and the 1/4 waveplate is disposed between the reflective mirror and the light beam and is located at a transmission path of the light beam. The 1/4 waveplate is adapted to convert the light beam into a first polarized light beam. The PBS has a connection surface and the 1/4 waveplate is disposed on the connection surface. The PBS is adapted to reflect the first polarized light beam to the reflective mirror, and the reflective mirror is adapted to reflect the first polarized light beam to the 1/4 waveplate. The 1/4 waveplate is adapted to convert the first polarized light beam into a second polarized light beam. The second polarized light beam passes through the PBS. The photo sensor is disposed at a transmission path of the second polarized light beam. A small angular motion of the reflective mirror will result in a corresponding small displacement of the second polarized beam on the photo sensor. The optical angular measuring apparatus has an advantage of low cost.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW099208058U TWM387986U (en) | 2010-04-30 | 2010-04-30 | Optical angular measuring apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW099208058U TWM387986U (en) | 2010-04-30 | 2010-04-30 | Optical angular measuring apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
TWM387986U true TWM387986U (en) | 2010-09-01 |
Family
ID=60591170
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW099208058U TWM387986U (en) | 2010-04-30 | 2010-04-30 | Optical angular measuring apparatus |
Country Status (1)
Country | Link |
---|---|
TW (1) | TWM387986U (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI491845B (en) * | 2013-12-09 | 2015-07-11 | Metal Ind Res & Dev Ct | Optical measurement system and method |
TWI502170B (en) * | 2014-01-22 | 2015-10-01 | Academia Sinica | Optical measurement system and method for measuring linear displacement, rotation and rolling angles |
TWI563240B (en) * | 2015-08-06 | 2016-12-21 | Optical inspection apparatus |
-
2010
- 2010-04-30 TW TW099208058U patent/TWM387986U/en not_active IP Right Cessation
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI491845B (en) * | 2013-12-09 | 2015-07-11 | Metal Ind Res & Dev Ct | Optical measurement system and method |
TWI502170B (en) * | 2014-01-22 | 2015-10-01 | Academia Sinica | Optical measurement system and method for measuring linear displacement, rotation and rolling angles |
TWI563240B (en) * | 2015-08-06 | 2016-12-21 | Optical inspection apparatus |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MK4K | Expiration of patent term of a granted utility model |