JP4398702B2 - プロジェクタ - Google Patents
プロジェクタ Download PDFInfo
- Publication number
- JP4398702B2 JP4398702B2 JP2003377430A JP2003377430A JP4398702B2 JP 4398702 B2 JP4398702 B2 JP 4398702B2 JP 2003377430 A JP2003377430 A JP 2003377430A JP 2003377430 A JP2003377430 A JP 2003377430A JP 4398702 B2 JP4398702 B2 JP 4398702B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- lens
- projection
- light receiving
- optical 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.)
- Expired - Fee Related
Links
- 230000003287 optical effect Effects 0.000 claims description 70
- 238000005259 measurement Methods 0.000 claims description 23
- 239000004973 liquid crystal related substance Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/53—Means for automatic focusing, e.g. to compensate thermal effects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C3/00—Measuring distances in line of sight; Optical rangefinders
- G01C3/10—Measuring distances in line of sight; Optical rangefinders using a parallactic triangle with variable angles and a base of fixed length in the observation station, e.g. in the instrument
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/317—Convergence or focusing systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3179—Video signal processing therefor
- H04N9/3185—Geometric adjustment, e.g. keystone or convergence
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Geometry (AREA)
- Automatic Focus Adjustment (AREA)
- Projection Apparatus (AREA)
- Focusing (AREA)
- Measurement Of Optical Distance (AREA)
Description
R:投光レンズ24の径
w:受光素子13のサイズ
f:ノイズ像70のサイズ
g:受光素子13の投光側端部と受光レンズの光軸25aとの距離
h:ノイズ像70の中心と受光レンズの光軸25aとの距離
t:受光素子13の中心と受光レンズの光軸25aとの距離
v:受光レンズ25と受光素子13との距離(≒受光レンズの焦点距離)
L:基線長
Z:投影面9(点P)までの設定距離
i:受光レンズの光軸25aと点Pとの間隔
10 IRED
13 受光素子
20 液晶プロジェクタ
21 投影レンズ
21a 投影レンズの光軸
24 投光レンズ
24a 投光光軸
25 受光レンズ
25a 受光レンズの光軸
30 鏡筒
35 ホルダプレート
38 レンズ駆動ユニット
39 測距ユニット
41 フォーカスモータ
54 測距IC
66 フォーカスレンズ
Claims (3)
- 投影レンズからの画像が投影される投影面に測距光を投光し、その反射光を受光レンズを通して受光素子で受けて投影面までの距離に対応した測距データを得るアクティブ式測距装置を備えたプロジェクタにおいて、
前記測距光の投光光軸と前記受光レンズの光軸とを、前記投影面と略垂直となる同一面内に、前記投影面の法線に対して同一方向に所定の角度だけ傾けて配置し、
前記所定の角度は、前記投影面で正反射した、前記測距光を投光する投光レンズからのノイズ光が、前記受光素子の光電面から外れる角度であることを特徴とするプロジェクタ。 - 投影面に測距光を投光する投光部及び前記受光素子を含む受光部とが測距ユニットとして一体化され、前記投影レンズとともに共通のホルダで保持されていることを特徴とする請求項1記載のプロジェクタ。
- 測距光の投光光軸と受光レンズの光軸とが互いに平行であることを特徴とする請求項1又は2記載のプロジェクタ。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003377430A JP4398702B2 (ja) | 2003-11-06 | 2003-11-06 | プロジェクタ |
US10/979,199 US7165849B2 (en) | 2003-11-06 | 2004-11-03 | Projector with auto focus device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003377430A JP4398702B2 (ja) | 2003-11-06 | 2003-11-06 | プロジェクタ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005140996A JP2005140996A (ja) | 2005-06-02 |
JP4398702B2 true JP4398702B2 (ja) | 2010-01-13 |
Family
ID=34544394
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003377430A Expired - Fee Related JP4398702B2 (ja) | 2003-11-06 | 2003-11-06 | プロジェクタ |
Country Status (2)
Country | Link |
---|---|
US (1) | US7165849B2 (ja) |
JP (1) | JP4398702B2 (ja) |
Families Citing this family (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7090360B2 (en) * | 2003-07-28 | 2006-08-15 | Seiko Epson Corporation | Projector |
US7060568B2 (en) * | 2004-06-30 | 2006-06-13 | Intel Corporation | Using different gate dielectrics with NMOS and PMOS transistors of a complementary metal oxide semiconductor integrated circuit |
US7246908B2 (en) * | 2004-09-28 | 2007-07-24 | Infocus Corporation | Combination control for a projection device |
US7490942B2 (en) * | 2004-11-23 | 2009-02-17 | Hewlett-Packard Development Company, L.P. | Projector with automatic focusing assistance |
JP2006184569A (ja) * | 2004-12-27 | 2006-07-13 | Toshiba Corp | 投射型表示装置および同装置の焦点調整方法 |
WO2006070708A1 (ja) * | 2004-12-28 | 2006-07-06 | Brother Kogyo Kabushiki Kaisha | プロジェクタ |
JP4293163B2 (ja) * | 2005-01-06 | 2009-07-08 | セイコーエプソン株式会社 | プロジェクタ |
JP2006317795A (ja) * | 2005-05-13 | 2006-11-24 | Toshiba Corp | 投射装置と投射装置の測距方法 |
JP3112503U (ja) * | 2005-05-16 | 2005-08-18 | 船井電機株式会社 | プロジェクタ |
JP2006352514A (ja) * | 2005-06-16 | 2006-12-28 | Seiko Epson Corp | プロジェクタおよび投射方法 |
JP2007067495A (ja) * | 2005-08-29 | 2007-03-15 | Toshiba Corp | プロジェクタ装置 |
JP5196715B2 (ja) * | 2005-09-09 | 2013-05-15 | キヤノン株式会社 | 投写レンズ装置、投写レンズ装置を有する光学機器 |
JP4702072B2 (ja) * | 2006-01-20 | 2011-06-15 | カシオ計算機株式会社 | 投影装置、投影装置の測距仰角制御方法及びプログラム |
JP4692531B2 (ja) * | 2007-09-13 | 2011-06-01 | カシオ計算機株式会社 | 投影装置及び光測距方法。 |
US8152313B2 (en) * | 2008-05-09 | 2012-04-10 | Sanyo Electric Co., Ltd. | Projection display device that displaces an optical position of an imager in conjunction with a focus adjustment |
JP4900408B2 (ja) * | 2009-03-24 | 2012-03-21 | セイコーエプソン株式会社 | プロジェクター |
DE102010023108B4 (de) | 2009-06-04 | 2019-12-05 | Sypro Optics Gmbh | Projektor mit automatischer Fokussierung und Abbildungsverfahren |
JP5830884B2 (ja) * | 2011-03-15 | 2015-12-09 | セイコーエプソン株式会社 | プロジェクター |
EP2629050B2 (de) * | 2012-02-16 | 2017-02-15 | Sick AG | Triangulationslichttaster |
JP5539422B2 (ja) * | 2012-02-27 | 2014-07-02 | キヤノン株式会社 | 投写レンズ装置、投写レンズ装置を有する光学機器 |
JP6205714B2 (ja) * | 2012-11-13 | 2017-10-04 | 株式会社リコー | オートフォーカス装置、投射レンズ装置、及び画像投射装置 |
JP6344092B2 (ja) * | 2014-06-30 | 2018-06-20 | セイコーエプソン株式会社 | プロジェクター |
US9800849B2 (en) * | 2014-10-31 | 2017-10-24 | Everready Precision Ind. Corp. | Combined optical lens module and optical imaging device using the same |
CN105549176A (zh) * | 2014-10-31 | 2016-05-04 | 高准精密工业股份有限公司 | 组合式光学镜头及具有该组合式光学镜头的光学影像装置 |
CN106154721B (zh) | 2015-04-27 | 2021-01-01 | 中兴通讯股份有限公司 | 一种测距方法、自动调焦方法及装置 |
CN106331666B (zh) * | 2015-07-03 | 2020-02-07 | 中兴通讯股份有限公司 | 一种投影终端梯形校正方法、装置及投影终端 |
CN107924114B (zh) * | 2015-09-01 | 2021-03-30 | 索尼公司 | 信息处理设备和信息处理方法 |
CN106791739A (zh) * | 2016-11-28 | 2017-05-31 | 北京小米移动软件有限公司 | 投影仪及其对焦方法和装置 |
US11920951B2 (en) * | 2019-02-28 | 2024-03-05 | Omron Corporation | Photoelectric sensor and method for manufacturing same |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04181935A (ja) * | 1990-11-16 | 1992-06-29 | Canon Inc | 自動焦点検出手段を有した光学装置 |
JPH05346569A (ja) | 1992-06-15 | 1993-12-27 | Canon Inc | プロジェクター及びそれに用いる投影系 |
JP2003161869A (ja) | 2001-11-26 | 2003-06-06 | Kyocera Corp | レンズ交換式プロジェクタの焦点位置・画角調整装置 |
-
2003
- 2003-11-06 JP JP2003377430A patent/JP4398702B2/ja not_active Expired - Fee Related
-
2004
- 2004-11-03 US US10/979,199 patent/US7165849B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2005140996A (ja) | 2005-06-02 |
US20050099609A1 (en) | 2005-05-12 |
US7165849B2 (en) | 2007-01-23 |
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