JPH0295309U - - Google Patents
Info
- Publication number
- JPH0295309U JPH0295309U JP396189U JP396189U JPH0295309U JP H0295309 U JPH0295309 U JP H0295309U JP 396189 U JP396189 U JP 396189U JP 396189 U JP396189 U JP 396189U JP H0295309 U JPH0295309 U JP H0295309U
- Authority
- JP
- Japan
- Prior art keywords
- lens
- correction
- projection
- barrel
- main projection
- 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 claims 1
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Description
第１図は本考案の一実施例によるビデオプロジ
エクターの要部を示す一部切欠き側面図、第２図
は内筒の変形例を示す要部縦断面図、第３図はビ
デオプロジエクターの全体の構成を示す概略縦断
面図、第４図は従来のビデオプロジエクターの要
部を示す一部切欠き側面図、第５図は従来のカツ
プリングレンズの取付け金具を示す外観斜視図で
ある。
２……ＣＲＴ、４，４′……カプラー、５，５
′……レンズ鏡筒、８……主投写レンズ、９，９
′……カツプリングレンズ（補正レンズ）、１１
……取付け金具、４１……冷却液、５３……内筒
、５６……案内溝、９３……突出部。
Fig. 1 is a partially cutaway side view showing the main parts of a video projector according to an embodiment of the present invention, Fig. 2 is a longitudinal sectional view of the main parts showing a modification of the inner cylinder, and Fig. 3 is a video projector. FIG. 4 is a partially cutaway side view showing the main parts of a conventional video projector, and FIG. 5 is an external perspective view showing the mounting bracket for a conventional coupling lens. be. 2...CRT, 4,4'...Coupler, 5,5
'...Lens barrel, 8...Main projection lens, 9,9
'...Coupling lens (correction lens), 11
... Mounting metal fittings, 41 ... Cooling liquid, 53 ... Inner cylinder, 56 ... Guide groove, 93 ... Projection.
Claims (1)
してスクリーン上に画像を投写する投写装置であ
つて、前記投写レンズが、レンズ鏡筒内に配され
た主投写レンズと補正レンズとで構成され、前記
主投写レンズが、前記レンズ鏡筒内に慴動可能に
嵌装された内筒に取り付けられ、前記補正レンズ
が前記主投写レンズと前記原画像形成面との間に
配置され、前記内筒が前記レンズ鏡筒内で慴動移
動することによつて前記主投写レンズの焦点合わ
せ及び前記主投写レンズと前記補正レンズとの光
軸合わせが行われるように構成された投写装置に
おいて、前記補正レンズは前記レンズ鏡筒の横断
面方向に移動可能に設けられるとともに、この補
正レンズの外周面が前記レンズ鏡筒の内周面から
離間して配され、光軸合わせの際に、前記内筒が
、前記レンズ鏡筒内において、前記補正レンズの
前縁部に嵌合する位置まで慴動移動し、焦点合わ
せの際に、前記内筒と前記補正レンズとの嵌合状
態が解除されるように構成したことを特徴とする
投写装置。 A projection device that projects an image onto a screen through a projection lens arranged in front of an original image forming surface, the projection lens comprising a main projection lens and a correction lens arranged in a lens barrel, The main projection lens is attached to an inner tube slidably fitted into the lens barrel, the correction lens is disposed between the main projection lens and the original image forming surface, and the correction lens is disposed between the main projection lens and the original image forming surface, and In the projection device configured such that the main projection lens is focused and the optical axes of the main projection lens and the correction lens are aligned by sliding movement within the lens barrel, the correction The lens is provided so as to be movable in the cross-sectional direction of the lens barrel, and the outer circumferential surface of the correction lens is spaced apart from the inner circumferential surface of the lens barrel. slides within the lens barrel to a position where it fits into the front edge of the correction lens, and the fitted state between the inner cylinder and the correction lens is released during focusing. A projection device comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP396189U JPH0736329Y2 (en) | 1989-01-18 | 1989-01-18 | Projection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP396189U JPH0736329Y2 (en) | 1989-01-18 | 1989-01-18 | Projection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0295309U true JPH0295309U (en) | 1990-07-30 |
| JPH0736329Y2 JPH0736329Y2 (en) | 1995-08-16 |
Family
ID=31206054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP396189U Expired - Lifetime JPH0736329Y2 (en) | 1989-01-18 | 1989-01-18 | Projection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0736329Y2 (en) |
-
1989
- 1989-01-18 JP JP396189U patent/JPH0736329Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0736329Y2 (en) | 1995-08-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |