JPS5722216A - Observing device for cylindrical inside wall - Google Patents

Observing device for cylindrical inside wall

Info

Publication number
JPS5722216A
JPS5722216A JP9687280A JP9687280A JPS5722216A JP S5722216 A JPS5722216 A JP S5722216A JP 9687280 A JP9687280 A JP 9687280A JP 9687280 A JP9687280 A JP 9687280A JP S5722216 A JPS5722216 A JP S5722216A
Authority
JP
Japan
Prior art keywords
point
inside wall
observing
cylindrical inside
lighting system
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
JP9687280A
Other languages
Japanese (ja)
Inventor
Fumi Hayashida
Ichiro Tsujimura
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.)
Nikon Corp
Nippon Chemical Industrial Co Ltd
Original Assignee
Nippon Chemical Industrial Co Ltd
Nippon Kogaku KK
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 Nippon Chemical Industrial Co Ltd, Nippon Kogaku KK filed Critical Nippon Chemical Industrial Co Ltd
Priority to JP9687280A priority Critical patent/JPS5722216A/en
Publication of JPS5722216A publication Critical patent/JPS5722216A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)

Abstract

PURPOSE:To observe a cylindrical inside wall brightly and satisfactorily over a wide range by disposing a lighting system and an observing system at a specific space with respect to the central axis of the cylinder of an observing device for cylindrical inside wall. CONSTITUTION:The beams of light emitted from a point P and reflected by regions A and B concentrate around the point S at an equal distance (r) from a center O at a 120 deg. angle from the point P, that is, on the same circumference. The radius (r) from the center O is roughly 2R/3 where the radius of this circumference is defined as R. Hence, a wide range of about 120 deg. angle between the regions A and B of the cylindrical wall is observed brightly by disposing a lighting system at the point P and an observing system at the point S, respectively. There is no need to say that the same holds true of the case when the lighting system and the observing system are substituted, on account of the principle of backward advance of rays.
JP9687280A 1980-07-17 1980-07-17 Observing device for cylindrical inside wall Pending JPS5722216A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9687280A JPS5722216A (en) 1980-07-17 1980-07-17 Observing device for cylindrical inside wall

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9687280A JPS5722216A (en) 1980-07-17 1980-07-17 Observing device for cylindrical inside wall

Publications (1)

Publication Number Publication Date
JPS5722216A true JPS5722216A (en) 1982-02-05

Family

ID=14176515

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9687280A Pending JPS5722216A (en) 1980-07-17 1980-07-17 Observing device for cylindrical inside wall

Country Status (1)

Country Link
JP (1) JPS5722216A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59127323A (en) * 1982-12-30 1984-07-23 インタ−ナシヨナル　ビジネス　マシ−ンズ　コ−ポレ−シヨン Contact structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59127323A (en) * 1982-12-30 1984-07-23 インタ−ナシヨナル　ビジネス　マシ−ンズ　コ−ポレ−シヨン Contact structure
JPH0144024B2 (en) * 1982-12-30 1989-09-25 Intaanashonaru Bijinesu Mashiinzu Corp

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