JPH03241310A - Optical device - Google Patents
Optical deviceInfo
- Publication number
- JPH03241310A JPH03241310A JP3738890A JP3738890A JPH03241310A JP H03241310 A JPH03241310 A JP H03241310A JP 3738890 A JP3738890 A JP 3738890A JP 3738890 A JP3738890 A JP 3738890A JP H03241310 A JPH03241310 A JP H03241310A
- Authority
- JP
- Japan
- Prior art keywords
- image
- optical system
- distortion
- aberration
- shaped
- 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 51
- 230000004075 alteration Effects 0.000 claims abstract description 14
- 239000004973 liquid crystal related substance Substances 0.000 claims description 12
- 238000003384 imaging method Methods 0.000 claims description 5
- 241000226585 Antennaria plantaginifolia Species 0.000 abstract description 4
- 230000004304 visual acuity Effects 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract 5
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 238000009125 cardiac resynchronization therapy Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
Landscapes
- Lenses (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ビューファインダ、投影装置など、画像表示
素子に表示される画像を光学系で拡大または縮小して得
られる虚像やスクリーン上に投影される実像を、肉眼あ
るいはＣＣＤカメラなどの撮像素子で観察する光学装置
に関するものである。Detailed Description of the Invention [Industrial Application Field] The present invention relates to a virtual image obtained by enlarging or reducing an image displayed on an image display element such as a viewfinder or a projection device using an optical system or projected onto a screen. The present invention relates to an optical device for observing a real image captured with the naked eye or with an image sensor such as a CCD camera.
通常、このような光学装置においては、収差のよく補正
された光学系を用い、正常な画像を歪みなく結像させる
ようにしている。Typically, such optical devices use an optical system with well-corrected aberrations to form a normal image without distortion.
しかるに光学系の収差を正しく補正しようとすると、レ
ンズの枚数が多くなったり、拡大・縮小の倍率が十分に
得られ々かったり、光学系全体の長さが著しく大きくｋ
つたりするなどの問題があった。特にビューファインダ
や投影装置においては、結像画像の歪みの一因となる光
学系の歪曲収差を補正することが重要であるが、解像力
や拡大。However, when attempting to correctly correct aberrations in an optical system, the number of lenses increases, it becomes difficult to obtain sufficient magnification and reduction, and the length of the entire optical system becomes significantly large.
There were problems such as dripping. Particularly in viewfinders and projection devices, it is important to correct the distortion aberration of the optical system that causes distortion of the formed image, but it is important to correct the distortion aberration of the optical system, which causes distortion of the formed image.
縮小倍率１．光学系全長などを考慮すると、十分に補正
することが不可能であったり、レンズ枚数が著しく増え
て構成が複雑になってしまうなどの問題があった。Reduction magnification 1. When considering the total length of the optical system, there are problems such as it is impossible to perform sufficient correction, or the number of lenses increases significantly, making the configuration complicated.
上記の問題を解決するため、本発明においては、光学系
の持つ収差による結像歪みと逆の傾向の歪みを表示画像
に与えることにより、両方の歪みが互いに補償されて正
しい結像画像を得る。In order to solve the above problem, in the present invention, by giving the displayed image a distortion that has a tendency opposite to the imaging distortion caused by the aberrations of the optical system, both distortions are mutually compensated and a correct imaging image is obtained. .
以下、図面により本発明の説明を行々う。 The present invention will be explained below with reference to the drawings.
第４図（４）は従来の投影装置の構成図である。画像表
示素子１に表示された旧のような格子状の表示画像は、
収差の良く補正された光学系３により、スクリーン５上
に（Ｃ）のよう々歪みのない結像画像として投影される
。FIG. 4 (4) is a block diagram of a conventional projection device. The old grid-like display image displayed on the image display element 1 is
The optical system 3 with well-corrected aberrations projects the image onto the screen 5 as a distortion-free image as shown in (C).
第１図囚は本発明による投影装置の構成図である。光学
系１３が樽型の歪曲収差を持つ場合、画像表示素子１１
に光学系の収差とは逆のＣＢ）のような糸巻型の歪みを
持つ格子状の表示画像があると、画像の歪みと光学系の
収差が相殺されてスクリ−ン５上には（Ｃ）のような正
しい格子状の結像画像が得られる。この場合、光学系の
解像力や拡大倍率、光学系全長などが従来の光学装置と
同じなら、一般に光学系のレンズ枚数を少なくすること
ができ、また同じレンズ枚数なら、従来の光学系よりも
解像力や拡大倍率を増やすことができる。FIG. 1 is a block diagram of a projection apparatus according to the present invention. When the optical system 13 has barrel distortion, the image display element 11
When there is a lattice-shaped display image with pincushion-shaped distortion such as CB, which is the opposite of the aberration of the optical system, the image distortion and the aberration of the optical system cancel each other out, and the image on the screen 5 becomes (CB). ), a correct grid-like image can be obtained. In this case, if the resolving power, magnification, total length of the optical system, etc. of the optical system are the same as those of a conventional optical system, the number of lenses in the optical system can generally be reduced, and if the number of lenses is the same, the resolving power will be higher than that of a conventional optical system. You can also increase the magnification.
第２図（４）は本発明による液晶プロジェクタの構成図
である。透過型の液晶パネル２１と、ランプ３１および
反射鏡３３からなる照明系と、光学系２３とにより、液
晶パネル２１の画像がスクリーン５に投影される。光学
系２６は樽型の歪曲収差を持っている。液晶パネル２１
に（Ｂ）のような糸巻型の歪みを持つ画像を表示すれば
、投影画像は（Ｃ）のように正しい画像となる。FIG. 2(4) is a configuration diagram of a liquid crystal projector according to the present invention. An image on the liquid crystal panel 21 is projected onto the screen 5 by a transmissive liquid crystal panel 21, an illumination system including a lamp 31 and a reflecting mirror 33, and an optical system 23. The optical system 26 has barrel-shaped distortion. LCD panel 21
If an image with pincushion distortion as shown in (B) is displayed, the projected image will be a correct image as shown in (C).
液晶パネルを用いるこのような装置においては、第３図
に示すように画像電極６７を湾曲させ、画素６５の形状
、分布を例えば糸巻型に歪ませて配置した液晶パネル３
９を用いるのがよい。これにより、通常の画像入力信号
で糸巻型の歪みを持つ像をパネルに表示できる。逆に光
学系の歪み特性が糸巻型なら、液晶パネルの画素配置は
樽型にする。画素配置が糸巻型である液晶パネルにおい
ては、中心から周辺に向かうに従って画素面積が大きく
なる。一般に照明系は中心から周辺に向かうにつれて照
射パワーが小さくなり、輝度ムラを生じるが、第３図の
ように周辺部の画素面積が大きい糸巻型の歪みを持つパ
ネルと、中心部より周辺部の方が拡大率の小さい樽型の
歪みを持つ光学系を組み合わせて投影すれば、輝度ムラ
が補正されるという効果もある。In such a device using a liquid crystal panel, the liquid crystal panel 3 is arranged such that the image electrode 67 is curved and the shape and distribution of the pixels 65 are distorted, for example, into a pincushion shape, as shown in FIG.
It is better to use 9. This allows an image with pincushion distortion to be displayed on the panel using a normal image input signal. Conversely, if the distortion characteristics of the optical system are pincushion-shaped, the pixel arrangement of the liquid crystal panel should be barrel-shaped. In a liquid crystal panel in which the pixel arrangement is pincushion-shaped, the pixel area increases from the center toward the periphery. Generally, in a lighting system, the irradiation power decreases as you move from the center to the periphery, causing uneven brightness. By combining an optical system with a barrel-shaped distortion with a smaller magnification ratio for projection, uneven brightness can be corrected.
表示画像を歪ませるには、このほか、映像信号の再生周
波数を選ぶことによって画像の縦横比を変えたり、表示
画面がＣＲＴ（陰極線管）である場合は、電子レンズの
偏向電圧を制御することなどくよっても行なうことがで
きる。特にＣＲＴにおいては、一般に電子レンズが光学
レンズと同様に糸巻型や樽型の歪みを発生しやすいので
、これを補正しようとするとＣＲＴの奥行きが増したり
、電子レンズの設計が困難になったりする。そこで本発
明を用いれば電子レンズの設計において最初から歪みを
許容することができ、設計が容易になる利点も生じる。Other ways to distort the displayed image include changing the aspect ratio of the image by selecting the reproduction frequency of the video signal, or controlling the deflection voltage of the electron lens if the display screen is a CRT (cathode ray tube). You can do it anyway. Particularly in CRTs, electronic lenses are generally prone to pincushion-shaped or barrel-shaped distortions, just like optical lenses, so attempting to correct this would either increase the depth of the CRT or make electronic lens design difficult. . Therefore, by using the present invention, distortion can be tolerated from the beginning in the design of an electronic lens, and there is also the advantage that the design becomes easier.
以上の説明から明らかなように、本発明によれば、ビュ
ーファインダや投影機などの光学装置において、光学系
を簡素化したり、光学系のレンズ構成が同じなら解像力
や拡大率を上げたり、光学系の全長を短くしたりできる
利点がある。As is clear from the above description, according to the present invention, in optical devices such as viewfinders and projectors, the optical system can be simplified, the resolving power and magnification can be increased if the lens configuration of the optical system is the same, and the optical system can be improved. This has the advantage of shortening the overall length of the system.
第１図は本発明による投影装置を示し、（４）は構成図
、（至）は表示画像、（Ｃ）は結像画像、第２図は本発
明による液晶プロジェクタを示し、（４）は構成図、（
５）は表示画像、（Ｃ）は結像画像、第３図は本発明に
よる液晶パネル、第４図は従来の投影装置を示し、（４
）は構成図、（Ｂは表示画像、（Ｃ）は結像画像である
。
１．１１・・・・・・画像表示素子、
３．１３．２６・・・・・・光学系、
５・・・・・・スクリーン、 ２１・・・・・・
液晶パネル、３１・・・・・・ランプ、 ６６
・・・・・・反射鏡、６５・・・・・・画素。
５スクリーン
（Ｃ）
３７、画素電侍
第１図
（Ａ）
（Ｂ）
（Ｃ）
第２図
（Ａ）
第４図
（Ａ）
（Ｂ）Fig. 1 shows a projection device according to the present invention, (4) shows a configuration diagram, (to) shows a displayed image, (C) shows a formed image, Fig. 2 shows a liquid crystal projector according to the invention, and (4) shows a displayed image. Diagram,(
5) shows a displayed image, (C) shows a formed image, FIG. 3 shows a liquid crystal panel according to the present invention, and FIG. 4 shows a conventional projection device.
) is a configuration diagram, (B is a display image, (C) is a formed image. 1.11... Image display element, 3.13.26... Optical system, 5. ...Screen, 21...
LCD panel, 31...Lamp, 66
...Reflector, 65...pixels. 5 Screen (C) 37, Pixel Densamu Figure 1 (A) (B) (C) Figure 2 (A) Figure 4 (A) (B)
Claims (4)
て、光学系は収差による結像歪みを持ち、画像表示素子
の表示画像は光学系の結像歪みを補償する歪みを持つこ
とを特徴とする光学装置。(1) An optical device equipped with an image display element and an optical system, characterized in that the optical system has imaging distortion due to aberration, and the displayed image of the image display element has distortion that compensates for the imaging distortion of the optical system. optical device.
つ結像歪みは樽型あるいは糸巻型であり、画像表示素子
の表示画像の持つ歪みは逆に糸巻型または樽型であるこ
とを特徴とする光学装置。(2) In the optical device according to claim 1, the imaging distortion of the optical system is barrel-shaped or pincushion-shaped, and the distortion of the displayed image of the image display element is conversely pincushion-shaped or barrel-shaped. Characteristic optical device.
子は液晶パネルであり、該液晶パネルの画素の形状およ
び配置に歪みを与えることにより歪んだ表示画像を得る
ことを特徴とする光学装置。(3) The optical device according to claim 1, wherein the image display element is a liquid crystal panel, and a distorted display image is obtained by distorting the shape and arrangement of pixels of the liquid crystal panel. .
の画素の形状および配置の歪みは糸巻型または樽型であ
ることを特徴とする光学装置。(4) The optical device according to claim 3, wherein the distortion of the shape and arrangement of pixels of the liquid crystal panel is pincushion-shaped or barrel-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02037388A JP3115879B2 (en) | 1990-02-20 | 1990-02-20 | Optical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02037388A JP3115879B2 (en) | 1990-02-20 | 1990-02-20 | Optical device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03241310A true JPH03241310A (en) | 1991-10-28 |
| JP3115879B2 JP3115879B2 (en) | 2000-12-11 |
Family
ID=12496146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02037388A Expired - Fee Related JP3115879B2 (en) | 1990-02-20 | 1990-02-20 | Optical device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3115879B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06148565A (en) * | 1992-11-13 | 1994-05-27 | Mitsubishi Electric Corp | Image display device |
| US5726670A (en) * | 1992-07-20 | 1998-03-10 | Olympus Optical Co., Ltd. | Display apparatus to be mounted on the head or face of an individual |
| JP2005241626A (en) * | 2004-01-28 | 2005-09-08 | Yazaki Corp | Display apparatus for vehicle |
| JP2021006859A (en) * | 2019-06-28 | 2021-01-21 | セイコーエプソン株式会社 | Projection optical system and projector |
| JP2021006858A (en) * | 2019-06-28 | 2021-01-21 | セイコーエプソン株式会社 | Projection optical system and projector |
| CN117908256A (en) * | 2024-01-19 | 2024-04-19 | 西安信飞特信息科技有限公司 | Near-eye display system, head-mounted display device, and near-eye display method |
-
1990
- 1990-02-20 JP JP02037388A patent/JP3115879B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5726670A (en) * | 1992-07-20 | 1998-03-10 | Olympus Optical Co., Ltd. | Display apparatus to be mounted on the head or face of an individual |
| JPH06148565A (en) * | 1992-11-13 | 1994-05-27 | Mitsubishi Electric Corp | Image display device |
| JP2005241626A (en) * | 2004-01-28 | 2005-09-08 | Yazaki Corp | Display apparatus for vehicle |
| JP4568087B2 (en) * | 2004-01-28 | 2010-10-27 | 矢崎総業株式会社 | Vehicle display device |
| JP2021006859A (en) * | 2019-06-28 | 2021-01-21 | セイコーエプソン株式会社 | Projection optical system and projector |
| JP2021006858A (en) * | 2019-06-28 | 2021-01-21 | セイコーエプソン株式会社 | Projection optical system and projector |
| US11550132B2 (en) | 2019-06-28 | 2023-01-10 | Seiko Epson Corporation | Projection optical system and projector |
| CN117908256A (en) * | 2024-01-19 | 2024-04-19 | 西安信飞特信息科技有限公司 | Near-eye display system, head-mounted display device, and near-eye display method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3115879B2 (en) | 2000-12-11 |
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