JPS5938701A - Ｎｄフイルタ− - Google Patents

Ｎｄフイルタ−

Info

Publication number
JPS5938701A
JPS5938701A JP57150420A JP15042082A JPS5938701A JP S5938701 A JPS5938701 A JP S5938701A JP 57150420 A JP57150420 A JP 57150420A JP 15042082 A JP15042082 A JP 15042082A JP S5938701 A JPS5938701 A JP S5938701A
Authority
JP
Japan
Prior art keywords
film
reflection
filter
spectral
divided
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
JP57150420A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0247722B2 (enrdf_load_stackoverflow
Inventor
Kiyoshi Ito
清 伊藤
Shiro Sasaki
佐々木　志郎
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.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo 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 Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Priority to JP57150420A priority Critical patent/JPS5938701A/ja
Publication of JPS5938701A publication Critical patent/JPS5938701A/ja
Publication of JPH0247722B2 publication Critical patent/JPH0247722B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Optical Filters (AREA)
  • Surface Treatment Of Optical Elements (AREA)
JP57150420A 1982-08-30 1982-08-30 Ｎｄフイルタ− Granted JPS5938701A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57150420A JPS5938701A (ja) 1982-08-30 1982-08-30 Ｎｄフイルタ−

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57150420A JPS5938701A (ja) 1982-08-30 1982-08-30 Ｎｄフイルタ−

Publications (2)

Publication Number Publication Date
JPS5938701A true JPS5938701A (ja) 1984-03-02
JPH0247722B2 JPH0247722B2 (enrdf_load_stackoverflow) 1990-10-22

Family

ID=15496544

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57150420A Granted JPS5938701A (ja) 1982-08-30 1982-08-30 Ｎｄフイルタ−

Country Status (1)

Country Link
JP (1) JPS5938701A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4838266A (en) * 1986-09-08 1989-06-13 Koziol Jeffrey E Lens shaping device using a laser attenuator
US5715103A (en) * 1993-08-26 1998-02-03 Canon Kabushiki Kaisha Neutral density (ND) filter
US6671109B2 (en) 2001-07-27 2003-12-30 Nidec Copal Corporation ND filter having composite PVD film of metal and its oxide
US7230779B2 (en) 2004-05-14 2007-06-12 Nidec Copal Corporation ND filter and aperture diaphragm apparatus
JP2010266889A (ja) * 2004-07-20 2010-11-25 Sumitomo Metal Mining Co Ltd 吸収型多層膜ｎｄフィルターの製造方法
JP2010277094A (ja) * 2004-11-24 2010-12-09 Sumitomo Metal Mining Co Ltd 吸収型多層膜ｎｄフィルターの製造方法
US11513440B2 (en) 2018-11-13 2022-11-29 Canon Kabushiki Kaisha Optical element, optical system, and optical apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4838266A (en) * 1986-09-08 1989-06-13 Koziol Jeffrey E Lens shaping device using a laser attenuator
US5715103A (en) * 1993-08-26 1998-02-03 Canon Kabushiki Kaisha Neutral density (ND) filter
US6671109B2 (en) 2001-07-27 2003-12-30 Nidec Copal Corporation ND filter having composite PVD film of metal and its oxide
US7230779B2 (en) 2004-05-14 2007-06-12 Nidec Copal Corporation ND filter and aperture diaphragm apparatus
JP2010266889A (ja) * 2004-07-20 2010-11-25 Sumitomo Metal Mining Co Ltd 吸収型多層膜ｎｄフィルターの製造方法
JP2010277094A (ja) * 2004-11-24 2010-12-09 Sumitomo Metal Mining Co Ltd 吸収型多層膜ｎｄフィルターの製造方法
US11513440B2 (en) 2018-11-13 2022-11-29 Canon Kabushiki Kaisha Optical element, optical system, and optical apparatus

Also Published As

Publication number Publication date
JPH0247722B2 (enrdf_load_stackoverflow) 1990-10-22

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