JPS642624A - Ophthalmic measuring method and apparatus - Google Patents

Ophthalmic measuring method and apparatus

Info

Publication number
JPS642624A
JPS642624A JP62156661A JP15666187A JPS642624A JP S642624 A JPS642624 A JP S642624A JP 62156661 A JP62156661 A JP 62156661A JP 15666187 A JP15666187 A JP 15666187A JP S642624 A JPS642624 A JP S642624A
Authority
JP
Japan
Prior art keywords
scanning
time
noise component
measuring point
slit
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
JP62156661A
Other languages
Japanese (ja)
Other versions
JP2557394B2 (en
JPH012624A (en
Inventor
Sunao Ichihashi
Koichi Akiyama
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.)
Kowa Co Ltd
Original Assignee
Kowa 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 Kowa Co Ltd filed Critical Kowa Co Ltd
Priority to JP62156661A priority Critical patent/JP2557394B2/en
Priority to EP88305550A priority patent/EP0296769B1/en
Priority to DE3851183T priority patent/DE3851183D1/en
Priority to US07/210,811 priority patent/US5000562A/en
Publication of JPH012624A publication Critical patent/JPH012624A/en
Publication of JPS642624A publication Critical patent/JPS642624A/en
Application granted granted Critical
Publication of JP2557394B2 publication Critical patent/JP2557394B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Eye Examination Apparatus (AREA)

Abstract

PURPOSE: To enhance measuring accuracy, by shifting laser beam in the second direction crossing the first direction almost at a right angle at every scanning and comparing the signals at the places same in the position in the first direction at the time of each scanning to remove the signal based on a noise component.
CONSTITUTION: A slit beam source 12 is allowed to light and the slit image of a slit 14 is formed to the part containing the measuring point P of the anterior sac 11a through beam splitters 8, 10 and a lens 9 and the beam from a laser beam source 1 is condensed to the measuring point P. A part of the beam scattered at the measuring point P is turned toward an examiner 33 by a beam splitter 21 to perform observation and, at the same time, incident to a photomultiplier tube 27 through a lens 22, a prism 23 and a mask 26. Since the scanning due to laser beam in a horizontal direction is performed and a region to be measured changes at each time when vertical scanning is performed once. the positions of the peak P of the count value based on a noise component are respectively different in sections b1, b2. The count values per a unit time at the places same in the position in a vertical direction are compared at the time of vertical scanning and the min value is selected to make it possible to remove the noise component.
COPYRIGHT: (C)1989,JPO&Japio
JP62156661A 1987-06-25 1987-06-25 Ophthalmic measuring device Expired - Lifetime JP2557394B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP62156661A JP2557394B2 (en) 1987-06-25 1987-06-25 Ophthalmic measuring device
EP88305550A EP0296769B1 (en) 1987-06-25 1988-06-17 Ophthalmic disease detection method and apparatus
DE3851183T DE3851183D1 (en) 1987-06-25 1988-06-17 Method and device for the diagnosis of eye disorders.
US07/210,811 US5000562A (en) 1987-06-25 1988-06-24 Ophthalmic disease detection method and apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62156661A JP2557394B2 (en) 1987-06-25 1987-06-25 Ophthalmic measuring device

Publications (3)

Publication Number Publication Date
JPH012624A JPH012624A (en) 1989-01-06
JPS642624A true JPS642624A (en) 1989-01-06
JP2557394B2 JP2557394B2 (en) 1996-11-27

Family

ID=15632536

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62156661A Expired - Lifetime JP2557394B2 (en) 1987-06-25 1987-06-25 Ophthalmic measuring device

Country Status (1)

Country Link
JP (1) JP2557394B2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6171032A (en) * 1984-06-14 1986-04-11 ハイデルベルク・インストルメンツ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Apparatus for displaying plane or thin layer range of human eye
JPS62117524A (en) * 1985-09-17 1987-05-29 アイ・リサ−チ・インステイテユ−ト・オブ・ザ・レテイナ・フアウンデイシヨン Double scanning optical apparatus
JPS62120834A (en) * 1985-11-21 1987-06-02 興和株式会社 Ophthalmic measuring apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6171032A (en) * 1984-06-14 1986-04-11 ハイデルベルク・インストルメンツ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Apparatus for displaying plane or thin layer range of human eye
JPS62117524A (en) * 1985-09-17 1987-05-29 アイ・リサ−チ・インステイテユ−ト・オブ・ザ・レテイナ・フアウンデイシヨン Double scanning optical apparatus
JPS62120834A (en) * 1985-11-21 1987-06-02 興和株式会社 Ophthalmic measuring apparatus

Also Published As

Publication number Publication date
JP2557394B2 (en) 1996-11-27

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