JPH0463401U - - Google Patents
Info
- Publication number
- JPH0463401U JPH0463401U JP10823390U JP10823390U JPH0463401U JP H0463401 U JPH0463401 U JP H0463401U JP 10823390 U JP10823390 U JP 10823390U JP 10823390 U JP10823390 U JP 10823390U JP H0463401 U JPH0463401 U JP H0463401U
- Authority
- JP
- Japan
- Prior art keywords
- light
- lens
- optical axis
- convergence
- etching
- 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
- 230000003287 optical effect Effects 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000005530 etching Methods 0.000 claims 1
- 239000003973 paint Substances 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Description
第１図は本考案の構成を示す断面図、第２図は
一般的な赤外線検知装置の構成を示す図、第３図
は従来技術に係るフレネルレンズの構成を示す断
面図である。
１……フレネルレンズ、１ａ……入射面、１ｂ
……分割面、１ｃ……仮想曲面、１ｄ……分割曲
面、２……赤外線センサ、３……増幅回路、４…
…制御部、５……警報器、Ａ……被検出領域、Ｂ
……光軸、Ｃ……被検出領域からの赤外線、Ｄ…
…被検出領域外からの赤外線。
FIG. 1 is a sectional view showing the structure of the present invention, FIG. 2 is a sectional view showing the structure of a general infrared detection device, and FIG. 3 is a sectional view showing the structure of a Fresnel lens according to the prior art. 1... Fresnel lens, 1a... Incident surface, 1b
... Divided surface, 1c... Virtual curved surface, 1d... Divided curved surface, 2... Infrared sensor, 3... Amplification circuit, 4...
...Control unit, 5...Alarm device, A...Detection area, B
...Optical axis, C...Infrared rays from the detection area, D...
...Infrared rays from outside the detection area.
Claims (1)
平行な光線の集光に影響を与えないレンズ分割面
のみを、エツチング、塗料の塗着等の適宜の手段
で遮光して成る遮光部を設けたフレネルレンズ。 In various Fresnel lenses, a light-shielding part is provided by blocking light by etching, applying paint, or other appropriate means only on the lens division surface that does not affect the convergence of light rays parallel to the optical axis. Fresnel lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10823390U JPH0463401U (en) | 1990-10-15 | 1990-10-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10823390U JPH0463401U (en) | 1990-10-15 | 1990-10-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0463401U true JPH0463401U (en) | 1992-05-29 |
Family
ID=31855112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10823390U Pending JPH0463401U (en) | 1990-10-15 | 1990-10-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0463401U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008304384A (en) * | 2007-06-08 | 2008-12-18 | Panasonic Electric Works Co Ltd | Infrared light detector |
| US8648307B2 (en) | 2007-06-08 | 2014-02-11 | Panasonic Corporation | Infrared ray detector |
| WO2020021916A1 (en) * | 2018-07-24 | 2020-01-30 | 株式会社ニコン | Ocular optical system and head mounted display |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62251701A (en) * | 1986-04-25 | 1987-11-02 | Toppan Printing Co Ltd | Production of fresnel plate having light absorbing layer |
-
1990
- 1990-10-15 JP JP10823390U patent/JPH0463401U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62251701A (en) * | 1986-04-25 | 1987-11-02 | Toppan Printing Co Ltd | Production of fresnel plate having light absorbing layer |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008304384A (en) * | 2007-06-08 | 2008-12-18 | Panasonic Electric Works Co Ltd | Infrared light detector |
| US8648307B2 (en) | 2007-06-08 | 2014-02-11 | Panasonic Corporation | Infrared ray detector |
| WO2020021916A1 (en) * | 2018-07-24 | 2020-01-30 | 株式会社ニコン | Ocular optical system and head mounted display |
| JPWO2020021916A1 (en) * | 2018-07-24 | 2021-06-24 | 株式会社ニコン | Eyepiece optics and head-mounted display |