JPS6449534A - Air-flow blow device for non-contact type tonometer - Google Patents
Air-flow blow device for non-contact type tonometerInfo
- Publication number
- JPS6449534A JPS6449534A JP62207054A JP20705487A JPS6449534A JP S6449534 A JPS6449534 A JP S6449534A JP 62207054 A JP62207054 A JP 62207054A JP 20705487 A JP20705487 A JP 20705487A JP S6449534 A JPS6449534 A JP S6449534A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- air
- suction
- cylinder
- examined
- 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
Landscapes
- Eye Examination Apparatus (AREA)
Abstract
PURPOSE:To prevent a nozzle from being contaminated by tears, etc., by providing a suction means for sucking air surrounding an eye to be examined into a cylinder when the pressure in the cylinder is negative. CONSTITUTION:A cylinder 10 has a compression chamber 14 wherein an air outlet 15 with a step is provided at the upper end thereof. The air outlet 15 has a suction hole 16 for sucking air surrounding an examined eye 22. The diameter D of the suction hole 16 is determined to satisfy the relation D>5d, wherein, d represents the diameter of a nozzle 21. The suction hole 16 has a suction valve 17 for closing the hole 16. When a piston 11 is pushed down to make the pressure of the compression chamber 14 negative, a solenoid 18 is activated to open the suction valve 17 for sucking air surrounding the eye to be examined 22 via a filter F into the compression chamber 14. Since the relation D>5d is satisfied, the air is sucked only from the suction hole 16 and is hardly sucked from the nozzle 21, thus preventing the nozzle from being contaminated by tears, etc.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62207054A JPS6449534A (en) | 1987-08-20 | 1987-08-20 | Air-flow blow device for non-contact type tonometer |
US07/234,043 US5048526A (en) | 1987-08-20 | 1988-08-19 | Gas jet shooting device for use with a non-contact tonometer |
US07/731,972 US5165408A (en) | 1987-08-20 | 1991-07-18 | Gas jet shooting device for use with a non-contact tonometer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62207054A JPS6449534A (en) | 1987-08-20 | 1987-08-20 | Air-flow blow device for non-contact type tonometer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6449534A true JPS6449534A (en) | 1989-02-27 |
Family
ID=16533444
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62207054A Pending JPS6449534A (en) | 1987-08-20 | 1987-08-20 | Air-flow blow device for non-contact type tonometer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6449534A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017055889A (en) * | 2015-09-15 | 2017-03-23 | 株式会社トーメーコーポレーション | Non-contact type tonometer |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6249826A (en) * | 1985-08-29 | 1987-03-04 | 株式会社トプコン | Air stream spray apparatus of non-contact type tonometer |
JPS6397143A (en) * | 1986-10-14 | 1988-04-27 | キヤノン株式会社 | Vacuum device of non-contact type tonometer |
JPS6334402B2 (en) * | 1982-03-30 | 1988-07-11 | Kogyo Gijutsuin | |
JPS63283621A (en) * | 1987-05-18 | 1988-11-21 | Canon Inc | Non-contact type tonometer |
-
1987
- 1987-08-20 JP JP62207054A patent/JPS6449534A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6334402B2 (en) * | 1982-03-30 | 1988-07-11 | Kogyo Gijutsuin | |
JPS6249826A (en) * | 1985-08-29 | 1987-03-04 | 株式会社トプコン | Air stream spray apparatus of non-contact type tonometer |
JPS6397143A (en) * | 1986-10-14 | 1988-04-27 | キヤノン株式会社 | Vacuum device of non-contact type tonometer |
JPS63283621A (en) * | 1987-05-18 | 1988-11-21 | Canon Inc | Non-contact type tonometer |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017055889A (en) * | 2015-09-15 | 2017-03-23 | 株式会社トーメーコーポレーション | Non-contact type tonometer |
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