JPH03241310A - Optical device - Google Patents

Optical device

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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
Application number
JP3738890A
Other languages
Japanese (ja)
Other versions
JP3115879B2 (en
Inventor
Nobuyuki Hashimoto
信幸 橋本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Citizen Watch Co Ltd
Original Assignee
Citizen Watch Co Ltd
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 by Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Priority to JP02037388A priority Critical patent/JP3115879B2/en
Publication of JPH03241310A publication Critical patent/JPH03241310A/en
Application granted granted Critical
Publication of JP3115879B2 publication Critical patent/JP3115879B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PURPOSE:To simplify the optical system by constituting the device so that the optical system has an image formation distortion caused by an aberration, and a display image of an image display element has a distortion for compensating the image formation distortion of the optical system. CONSTITUTION:By giving an image formation distortion caused by an aberration which an optical system has and a distortion of the opposite tendency to a display image, both the distortions are compensated each other and a correct image formation image is obtained. That is, in the case the optical system 13 has a barrel-shape distortion aberration, when a lattice-like display image having a pin cushion distortion as shown in B being opposite to an aberration of the optical system exists in an image display element 11, the distortion of the image and the aberration of the optical system are offset and on a screen 5, a correct lattice-like image formation image as shown in C is obtained. In this case, when resolving power and enlargement magnification of the optical system, overall length of the optical system, etc., are the same as a conventional optical device, generally, the number of pieces of lenses of the optical system can be decreased.

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.

〔従来の技術〕[Conventional technology]

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.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

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.

〔課題を解決するための手段〕[Means to solve the problem]

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. .

〔実施例〕〔Example〕

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.

〔発明の効果〕〔Effect of the invention〕

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.

【図面の簡単な説明】[Brief explanation of drawings]

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)

【特許請求の範囲】[Claims] (1)画像表示素子と光学系とを備えた光学装置におい
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.
(2)請求項1に記載の光学装置において、光学系の持
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.
(3)請求項1に記載の光学装置において、画像表示素
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. .
(4)請求項3に記載の光学装置において、液晶パネル
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.
JP02037388A 1990-02-20 1990-02-20 Optical device Expired - Fee Related JP3115879B2 (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (8)

* Cited by examiner, † Cited by third party
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

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