JPH08510336A - ホログラフ・レーザ・スキャナおよびレンジ・ファインダ - Google Patents
ホログラフ・レーザ・スキャナおよびレンジ・ファインダInfo
- Publication number
- JPH08510336A JPH08510336A JP6524383A JP52438394A JPH08510336A JP H08510336 A JPH08510336 A JP H08510336A JP 6524383 A JP6524383 A JP 6524383A JP 52438394 A JP52438394 A JP 52438394A JP H08510336 A JPH08510336 A JP H08510336A
- Authority
- JP
- Japan
- Prior art keywords
- hologram
- angle
- substrate
- optical element
- axis
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/106—Scanning systems having diffraction gratings as scanning elements, e.g. holographic scanners
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
- G01S7/4817—Constructional features, e.g. arrangements of optical elements relating to scanning
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/93—Lidar systems specially adapted for specific applications for anti-collision purposes
- G01S17/933—Lidar systems specially adapted for specific applications for anti-collision purposes of aircraft or spacecraft
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2270/00—Substrate bearing the hologram
- G03H2270/20—Shape
- G03H2270/22—Disc shaped
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.回転軸に対し、回転対称である基板構造の形態であって、少なくとも2つ のホログラムを回転可能に支持する手段と、 垂直入射経路上の基盤構造上の第1ホログラムの形態であって、ビームを回転 軸から第1放射方向に第1鋭角だけ回折するための手段と、 第1方向転換経路上の基板構造上の第2ホログラムの形態であって、ビームを 回転軸から逆方向の第2放射方向に、異なる角度の第2鋭角だけ第2の方向転換 経路へ回折するための手段とを備え、 これにより、第2の方向転換経路は、回転軸に対して、第1角の大きさと第2 角の大きさの差である大きさを有する角度にあることを特徴とするホログラフ光 学要素。 2.基板構造上のフィルタ要素の形態であって、第1ホログラムを通過した0 次漏洩の入射ビームを抑制するための手段を含むことを特徴とする請求項1記載 のホログラフ光学要素。 3.基板構造上の薄膜干渉フィルタをフィルタ要素として含むことを特徴とす る請求項2記載のホログラフ光学要素。 4.薄膜干渉フィルタが、誘電スタック、透過ホログラムまたは反射ホログラ ムのいずれかの形態からなることを特徴とする請求項3記載のホログラフ光学要 素。 5.基板構造の形態における手段は、第1ホログラムを支持する第1基板、第 1ホログラムを支持する第2基板およびフィルタ要素を支持する第3基板を含み 、第1、第2および第3基板が、第1および第2基板との間に第3基板が積層す るように接着されていることを特徴とする請求項3記載のホログラフ光学要素。 6.基板構造が円盤型構造を含むことを特徴とする請求項1記載のホログラフ 光学要素。 7.第1角および第2角が20度から60度の範囲内であるように、第1およ び第2ホログラムがインプリントされていることを特徴とする請求項1記載のホ ログラフ光学要素。 8.第2ホログムを通過した0次漏洩が、実質的に内部全反射を達成するよう 第1ホログムがインプリントされていることを特徴とする請求項1記載のホログ ラフ光学要素。 9.第1角が約45度の内角、第2角が約53度の内角を持つように、第1お よび第2ホログムがインプリントされていることを特徴とする請求項7記載のホ ログラフ光学要素。 10.第1角が約30度の内角、第2角が約38度の内角となるように、第1 および第2ホログムがインプリントされていることを特徴とする請求項7記載の ホログラフ光学要素。 11.回転軸に対して回転対称を有する基板構造の形態であって、この基板構 造は、第3基板を第1および第2基板との間に入れるために、第1、第2および 第3基板が接着されているものを含み、ビームを軸からずれた望ましい方向へ向 け、0次漏洩を抑制するため、少なくとも2つのホログムと1つの薄膜フィルタ 要素を、垂直入射の軸方向に向けられたビームの経路上で回転可能に支持する手 段と、 第1基板上の第1ホログラムの形態であって、ビームを、第1放射方向内で回 転軸から第1鋭角だけ第1方向転換経路へ方向転換する手段と、 第2基板上の第2ホログラムの形態であって、第2放射経路が、第1角を第2 角の間の大きさの回転軸からの角度となるように、このビームを、回転軸から逆 の第2放射方向に第2鋭角だけ第2方向転換経路へ方向を変えるための手段と、 第3基板上の薄膜干渉フィルタの形態であって、第1ホログラムを通過した0 次漏洩入射ビームを抑制するための手段とからなることを特徴とするホログラフ 光学要素。 12.第1ホログラムが、垂直入射ビームの0次漏洩の内部反射に必要な臨界 角より小さい角度で回折し、ホログラフ光学要素が、第2ホログラムを通過する 入射ビームの全ての0次漏洩の経路に配置された薄膜干渉フィルタの形態であっ て、0次漏洩を抑制する手段を含むことを特徴とする請求項10記載のホログラ フ光学要素。 13.第1および第2ホログラムの少なくとも1つに、シュミット型取差補正 が重ね焼されたことを特徴とする請求項1記載のホログラフ光学要素。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/056,218 US5471326A (en) | 1993-04-30 | 1993-04-30 | Holographic laser scanner and rangefinder |
US08/056,218 | 1993-04-30 | ||
PCT/US1994/004374 WO1994025890A1 (en) | 1993-04-30 | 1994-04-20 | Holographic laser scanner and rangefinder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH08510336A true JPH08510336A (ja) | 1996-10-29 |
JP3553597B2 JP3553597B2 (ja) | 2004-08-11 |
Family
ID=22002974
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52438394A Expired - Fee Related JP3553597B2 (ja) | 1993-04-30 | 1994-04-20 | ホログラフ光学要素 |
Country Status (6)
Country | Link |
---|---|
US (1) | US5471326A (ja) |
EP (1) | EP0696360B1 (ja) |
JP (1) | JP3553597B2 (ja) |
DE (1) | DE69421697T2 (ja) |
IL (1) | IL109391A (ja) |
WO (1) | WO1994025890A1 (ja) |
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-
1993
- 1993-04-30 US US08/056,218 patent/US5471326A/en not_active Expired - Lifetime
-
1994
- 1994-04-20 DE DE69421697T patent/DE69421697T2/de not_active Expired - Fee Related
- 1994-04-20 WO PCT/US1994/004374 patent/WO1994025890A1/en active IP Right Grant
- 1994-04-20 EP EP94915844A patent/EP0696360B1/en not_active Expired - Lifetime
- 1994-04-20 JP JP52438394A patent/JP3553597B2/ja not_active Expired - Fee Related
- 1994-04-22 IL IL109391A patent/IL109391A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
WO1994025890A1 (en) | 1994-11-10 |
EP0696360B1 (en) | 1999-11-17 |
DE69421697D1 (de) | 1999-12-23 |
DE69421697T2 (de) | 2000-06-21 |
US5471326A (en) | 1995-11-28 |
JP3553597B2 (ja) | 2004-08-11 |
EP0696360A1 (en) | 1996-02-14 |
IL109391A (en) | 1998-04-05 |
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