JPH0450004U - - Google Patents
Info
- Publication number
- JPH0450004U JPH0450004U JP9285390U JP9285390U JPH0450004U JP H0450004 U JPH0450004 U JP H0450004U JP 9285390 U JP9285390 U JP 9285390U JP 9285390 U JP9285390 U JP 9285390U JP H0450004 U JPH0450004 U JP H0450004U
- Authority
- JP
- Japan
- Prior art keywords
- optometry
- projected
- optotype
- chart
- optometry apparatus
- 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 1
Description
第１図は本考案の一実施例の側断面図、第２図
は同上の視標盤の平面図、第３図〜第６図はそれ
ぞれ同上の視標チヤートの実施例、第７図は同上
の視標チヤート投影原理説明図、第８図は同上の
子供用の視標チヤートの一実施例である。
１……検眼装置、２……検眼装置本体、３……
視標盤、４……視標チヤート、５……光学系、８
……投影スクリーン、１１……回転駆動装置。
FIG. 1 is a side sectional view of an embodiment of the present invention, FIG. 2 is a plan view of the same optotype chart, FIGS. 3 to 6 are examples of the same optotype chart, and FIG. FIG. 8, which is an explanatory diagram of the principle of projection of the same optotype chart as above, is an embodiment of the above-mentioned optotype chart for children. 1...Optometry device, 2...Optometry device body, 3...
optotype board, 4... optotype chart, 5... optical system, 8
...Projection screen, 11...Rotary drive device.
Claims (1)
放射状に取り付けた視標盤を視標選択可能に回転
駆動装置で回転自在に配設し、 選択した視標チヤートを光学系で所定の大きさ
に投影拡大して検眼装置本体の正面に設けた投影
スクリーンに投影するように形成したことを特徴
とする検眼装置。[Scope of Claim for Utility Model Registration] A box-shaped optometry device body has a large number of optometry charts attached radially, and is rotatably arranged by a rotary drive device so that the optotype can be selected. An optometry apparatus characterized in that a chart is projected and enlarged to a predetermined size using an optical system and projected onto a projection screen provided in front of an optometry apparatus main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9285390U JPH0450004U (en) | 1990-09-03 | 1990-09-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9285390U JPH0450004U (en) | 1990-09-03 | 1990-09-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0450004U true JPH0450004U (en) | 1992-04-27 |
Family
ID=31829625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9285390U Pending JPH0450004U (en) | 1990-09-03 | 1990-09-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0450004U (en) |
-
1990
- 1990-09-03 JP JP9285390U patent/JPH0450004U/ja active Pending
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