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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
Application number
JP10823390U
Other languages
English (en)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP10823390U priority Critical patent/JPH0463401U/ja
Publication of JPH0463401U publication Critical patent/JPH0463401U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Lens Barrels (AREA)
  • Burglar Alarm Systems (AREA)

Description

【図面の簡単な説明】
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。

Claims (1)

    【実用新案登録請求の範囲】
  1. 各種のフレネルレンズに於いて、光軸に対して
    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。
JP10823390U 1990-10-15 1990-10-15 Pending JPH0463401U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10823390U JPH0463401U (ja) 1990-10-15 1990-10-15

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10823390U JPH0463401U (ja) 1990-10-15 1990-10-15

Publications (1)

Publication Number Publication Date
JPH0463401U true JPH0463401U (ja) 1992-05-29

Family

ID=31855112

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10823390U Pending JPH0463401U (ja) 1990-10-15 1990-10-15

Country Status (1)

Country Link
JP (1) JPH0463401U (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008304384A (ja) * 2007-06-08 2008-12-18 Panasonic Electric Works Co Ltd 赤外光検出器
US8648307B2 (en) 2007-06-08 2014-02-11 Panasonic Corporation Infrared ray detector
WO2020021916A1 (ja) * 2018-07-24 2020-01-30 株式会社ニコン 接眼光学系およびヘッドマウントディスプレイ

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62251701A (ja) * 1986-04-25 1987-11-02 Toppan Printing Co Ltd 光吸収層を有するフレネル板の製造方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62251701A (ja) * 1986-04-25 1987-11-02 Toppan Printing Co Ltd 光吸収層を有するフレネル板の製造方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008304384A (ja) * 2007-06-08 2008-12-18 Panasonic Electric Works Co Ltd 赤外光検出器
US8648307B2 (en) 2007-06-08 2014-02-11 Panasonic Corporation Infrared ray detector
WO2020021916A1 (ja) * 2018-07-24 2020-01-30 株式会社ニコン 接眼光学系およびヘッドマウントディスプレイ
JPWO2020021916A1 (ja) * 2018-07-24 2021-06-24 株式会社ニコン 接眼光学系およびヘッドマウントディスプレイ

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