JPS63163804U - - Google Patents
Info
- Publication number
- JPS63163804U JPS63163804U JP5656887U JP5656887U JPS63163804U JP S63163804 U JPS63163804 U JP S63163804U JP 5656887 U JP5656887 U JP 5656887U JP 5656887 U JP5656887 U JP 5656887U JP S63163804 U JPS63163804 U JP S63163804U
- Authority
- JP
- Japan
- Prior art keywords
- optotype
- chart
- visual acuity
- mask plate
- acuity test
- 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
- 230000004304 visual acuity Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
Description
第１図は、本考案の一実施例による装置の構成
概略図、第２図は第１図の視力検査用視標板（チ
ヤート板）の拡大平面図、第３図は第２図の一つ
のチヤートの拡大図、第４図は第１図のマスク板
の拡大平面図、第５図ａ，ｂ，ｃは、第１図の実
施例による投影視野の例を示す図である。
〔主要部分の符号の説明〕、１……スクリーン
、２……投影レンズ、３……集光レンズ、４……
フイルター、５……光源（ハロゲンランプ）、６
……半透過マスク板、７……視力検査用視標板（
チヤート板）、８……マスク板用モータ、９……
チヤート板用モータ。
FIG. 1 is a schematic diagram of the configuration of an apparatus according to an embodiment of the present invention, FIG. 2 is an enlarged plan view of the chart board for visual acuity test shown in FIG. 1, and FIG. FIG. 4 is an enlarged plan view of the mask plate of FIG. 1, and FIGS. 5a, b, and c are diagrams showing examples of the projection field according to the embodiment of FIG. 1. [Explanation of symbols of main parts] 1... Screen, 2... Projection lens, 3... Condensing lens, 4...
Filter, 5... Light source (halogen lamp), 6
...Semi-transparent mask board, 7...Visual acuity test optotype board (
Chart board), 8...Mask board motor, 9...
Chart board motor.
Claims (1)
板と； 該チヤート板に重ねて設けられ、前記チヤート
から任意の視標を視力検査視標として選択する透
過部を有するマスク板と； を有し、前記マスク板により選択された視標を所
定の投影面に投影する視力検査用視標投影装置に
おいて、 前記チヤート内の前記選択された視標以外の視
標の背景を、前記選択された視標による視力検査
機能を損なわない程度の明るさになすように、前
記マスク板の前記透過部以外の領域を半透過性と
したことを特徴とする視力検査用視標投影装置。[Claims for Utility Model Registration] A chart board having a chart provided with a plurality of optotypes; and a transparent section provided overlapping the chart board to select any optotype from the chart as an optotype for a visual acuity test. A visual acuity test optotype projection device that has a mask plate and projects an optotype selected by the mask plate onto a predetermined projection plane, the background of the optotype other than the selected optotype in the chart. An optotype for visual acuity testing, characterized in that an area other than the transparent portion of the mask plate is made semi-transparent so that the brightness is to a level that does not impair the visual acuity test function of the selected optotype. Projection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5656887U JPH0530403Y2 (en) | 1987-04-14 | 1987-04-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5656887U JPH0530403Y2 (en) | 1987-04-14 | 1987-04-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63163804U true JPS63163804U (en) | 1988-10-26 |
| JPH0530403Y2 JPH0530403Y2 (en) | 1993-08-04 |
Family
ID=30885492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5656887U Expired - Lifetime JPH0530403Y2 (en) | 1987-04-14 | 1987-04-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0530403Y2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001275970A (en) * | 2000-03-31 | 2001-10-09 | Topcon Corp | Test types equipment |
| KR101039222B1 (en) | 2002-12-04 | 2011-06-03 | 가부시키가이샤 토프콘 | Ophthalmologic apparatus |
| JP2016097194A (en) * | 2014-11-25 | 2016-05-30 | 株式会社タカギセイコー | Visual acuity testing device |
| JP2020156686A (en) * | 2019-03-26 | 2020-10-01 | 株式会社トプコン | Visual target presentation device |
-
1987
- 1987-04-14 JP JP5656887U patent/JPH0530403Y2/ja not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001275970A (en) * | 2000-03-31 | 2001-10-09 | Topcon Corp | Test types equipment |
| JP4562850B2 (en) * | 2000-03-31 | 2010-10-13 | 株式会社トプコン | Sight table device |
| KR101039222B1 (en) | 2002-12-04 | 2011-06-03 | 가부시키가이샤 토프콘 | Ophthalmologic apparatus |
| JP2016097194A (en) * | 2014-11-25 | 2016-05-30 | 株式会社タカギセイコー | Visual acuity testing device |
| JP2020156686A (en) * | 2019-03-26 | 2020-10-01 | 株式会社トプコン | Visual target presentation device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0530403Y2 (en) | 1993-08-04 |
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