JPS5789721A - Manufacture of optical low-pass filter - Google Patents

Manufacture of optical low-pass filter

Info

Publication number
JPS5789721A
JPS5789721A JP16574080A JP16574080A JPS5789721A JP S5789721 A JPS5789721 A JP S5789721A JP 16574080 A JP16574080 A JP 16574080A JP 16574080 A JP16574080 A JP 16574080A JP S5789721 A JPS5789721 A JP S5789721A
Authority
JP
Japan
Prior art keywords
press
curved surfaces
conditions
manufacture
die
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
JP16574080A
Other languages
Japanese (ja)
Other versions
JPS6055810B2 (en
Inventor
Yasuo Hirata
Yoshitomo Otake
Shinsuke Ono
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.)
Victor Company of Japan Ltd
Nippon Victor KK
Original Assignee
Victor Company of Japan Ltd
Nippon Victor 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 Victor Company of Japan Ltd, Nippon Victor KK filed Critical Victor Company of Japan Ltd
Priority to JP16574080A priority Critical patent/JPS6055810B2/en
Publication of JPS5789721A publication Critical patent/JPS5789721A/en
Publication of JPS6055810B2 publication Critical patent/JPS6055810B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
    • G02B27/46—Systems using spatial filters

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To manufacture a filter of high quality, which has curved surfaces at mountain parts and valley parts, by using a press die manufactured easily with high precision by using a sectionally triangular forming die and by performing formation while controlling press conditions. CONSTITUTION:A forming mold 23 in a sectionally triangluar shape determined by slanting planes 24a and 24b succeeding by turns and in the opposite directions is used and while press conditions are controlled, an acrylic resin plate 16, etc., is pressed to form curved surfaces 2c and 2d at mountain and valley parts by drawback movement after the formation. For example, the die 23 of a 0.8mm. pitch P and 3'(minute) angle beta in a sectionally triangular shape is used and under the conditions of 70kg/cm<2> press pressure, 116 deg.C press temperature and 10 second press time, the acrylic resin plate 16 is pressed, thus obtaining a formed body 25 which has curved surfaces 2c and 2d formed by drawback movement.
JP16574080A 1980-11-25 1980-11-25 Method of manufacturing optical low-pass filter Expired JPS6055810B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16574080A JPS6055810B2 (en) 1980-11-25 1980-11-25 Method of manufacturing optical low-pass filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16574080A JPS6055810B2 (en) 1980-11-25 1980-11-25 Method of manufacturing optical low-pass filter

Publications (2)

Publication Number Publication Date
JPS5789721A true JPS5789721A (en) 1982-06-04
JPS6055810B2 JPS6055810B2 (en) 1985-12-06

Family

ID=15818168

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16574080A Expired JPS6055810B2 (en) 1980-11-25 1980-11-25 Method of manufacturing optical low-pass filter

Country Status (1)

Country Link
JP (1) JPS6055810B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07293361A (en) * 1985-01-26 1995-11-07 Robert Bosch Gmbh Fuel tank exhauster for internal combustion engine
WO1998025167A1 (en) * 1996-12-03 1998-06-11 Kureha Kagaku Kogyo Kabushiki Kaisha Phase grating and its manufacturing method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0525103U (en) * 1991-08-27 1993-04-02 三菱重工業株式会社 Rear flue bypass controller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07293361A (en) * 1985-01-26 1995-11-07 Robert Bosch Gmbh Fuel tank exhauster for internal combustion engine
WO1998025167A1 (en) * 1996-12-03 1998-06-11 Kureha Kagaku Kogyo Kabushiki Kaisha Phase grating and its manufacturing method

Also Published As

Publication number Publication date
JPS6055810B2 (en) 1985-12-06

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