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JPS51145335A - Light quantity iris device - Google Patents

Light quantity iris device

Info

Publication number
JPS51145335A
JPS51145335A JP6910275A JP6910275A JPS51145335A JP S51145335 A JPS51145335 A JP S51145335A JP 6910275 A JP6910275 A JP 6910275A JP 6910275 A JP6910275 A JP 6910275A JP S51145335 A JPS51145335 A JP S51145335A
Authority
JP
Japan
Prior art keywords
light quantity
iris device
quantity iris
light
clearvoyance
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
Application number
JP6910275A
Other languages
Japanese (ja)
Inventor
Nobuo Mizuki
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.)
Toyo Electric Manufacturing Ltd
Original Assignee
Toyo Electric Manufacturing 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 Toyo Electric Manufacturing Ltd filed Critical Toyo Electric Manufacturing Ltd
Priority to JP6910275A priority Critical patent/JPS51145335A/en
Publication of JPS51145335A publication Critical patent/JPS51145335A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: Easily switching a light passage rate, relative to a light iris device emplyed in a clearvoyance window on a mask wore on by an operator in a welding operation or the like.
COPYRIGHT: (C)1976,JPO&Japio
JP6910275A 1975-06-10 1975-06-10 Light quantity iris device Pending JPS51145335A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6910275A JPS51145335A (en) 1975-06-10 1975-06-10 Light quantity iris device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6910275A JPS51145335A (en) 1975-06-10 1975-06-10 Light quantity iris device

Publications (1)

Publication Number Publication Date
JPS51145335A true JPS51145335A (en) 1976-12-14

Family

ID=13392910

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6910275A Pending JPS51145335A (en) 1975-06-10 1975-06-10 Light quantity iris device

Country Status (1)

Country Link
JP (1) JPS51145335A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3449038A (en) * 1964-03-10 1969-06-10 Int Computers & Tabulators Ltd Electro-optical switching devices

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3449038A (en) * 1964-03-10 1969-06-10 Int Computers & Tabulators Ltd Electro-optical switching devices

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