WO2005047940A1 - Ndフィルタ及びこれを用いた光量絞り装置 - Google Patents
Ndフィルタ及びこれを用いた光量絞り装置 Download PDFInfo
- Publication number
- WO2005047940A1 WO2005047940A1 PCT/JP2004/016755 JP2004016755W WO2005047940A1 WO 2005047940 A1 WO2005047940 A1 WO 2005047940A1 JP 2004016755 W JP2004016755 W JP 2004016755W WO 2005047940 A1 WO2005047940 A1 WO 2005047940A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- film
- filter
- metal
- light
- dielectric film
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B9/00—Exposure-making shutters; Diaphragms
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/22—Absorbing filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00634—Production of filters
- B29D11/00644—Production of filters polarizing
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/003—Light absorbing elements
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
- G03B7/18—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly in accordance with light-reducing "factor" of filter or other obturator used with or on the lens of the camera
Definitions
- the present invention relates to an ND filter.
- ND Neutral Density-1
- filters are used to reduce the amount of transmitted light uniformly over the entire visible range for reducing the amount of light.
- Patent Document 1 JP-A-52-113236
- Patent Document 2 JP-A-07-063915
- Patent Document 3 Japanese Patent Application Laid-Open No. 2003-043211
- Patent Document 1 discloses that a metal thin film (Ti, Ni, etc.) and a dielectric film (MgF
- Patent Document 2 An ND filter consisting of alternating layers has been proposed. That is, Patent Document 1 uses a metal film as a light absorbing film. For this reason, the thickness of the metal film for forming an ND filter having a large extinction coefficient of the light absorption film becomes extremely thin, and it is difficult to control the thickness. Further, when the thickness of the light absorbing film is small, it is difficult to obtain an antireflection effect due to the design of the optical multilayer film. [0005] Patent Document 2 discloses that the alternating layer force of two or more kinds of Ti metal oxide films (extinction coefficient k: 1.0 to 3.0) and a dielectric film (Al 2 O 3, SiO 2, MgF 2) is also obtained. We have proposed an ND filter. Patent Document 2
- the material itself is unstable and the absorbing film contains a large amount of unstable substances such as a lower acid oxide, the optical characteristics change over time.
- the extinction coefficient k in the range of 1.0-3.0, it is necessary to form a film at a high temperature of 150 ° C or more.
- the substrate is greatly damaged. There is a problem. Further, there is a problem that the raw material price of the lower oxide itself is high.
- Patent Document 3 discloses a thin-film ND filter in which a light absorption film and a dielectric film are laminated on a transparent substrate.
- the light-absorbing film is formed by vapor deposition using a metal material as a raw material.
- a mixed gas containing oxygen is introduced at the time of film formation, and the metal material generated while maintaining a constant degree of vacuum is formed.
- the composition of the oxide of the metal material contained in the light absorbing film has not always been clarified.
- an object of the present invention is to provide a thin-film ND filter that is inexpensive and has excellent durability.
- the following measures were taken in order to achieve these objectives. That is, in an ND filter in which a light absorbing film and a dielectric film are laminated on a transparent substrate, the composition of the light absorbing film is as follows: 110% by weight of a single metal component and 50% by weight of a saturated oxide component of the metal. As described above, the other residual component is characterized by being composed of a compound of the metal including a lower oxide of the metal.
- the metal raw material of the light absorbing film is selected from Ti, Cr, Ni, NiCr, NiFe and ⁇ .
- the dielectric film uses SiO or Al 2 O 3.
- a film and a dielectric film are laminated in a predetermined thickness and in a predetermined order to provide an antireflection function.
- an antireflection layer may be provided on a surface different from the surface of the transparent substrate on which the light absorbing film and the dielectric film are laminated.
- the antireflection layer can be formed as a single layer of a light absorbing film or a dielectric film.
- the antireflection layer can be formed of a plurality of layers of a light absorbing film and a dielectric film.
- the antireflection layer is a thermosetting material that is transparent in the visible light region. It can be formed in a single layer or a plurality of layers by using a resin or a photocurable resin. Such an ND filter is used for a light amount diaphragm device.
- a light absorbing film mainly containing a saturated oxide containing a simple metal is produced, and an ND filter is produced by a laminated structure of the absorbing film and the dielectric film.
- a ND filter that is characteristically and stable over time is obtained by minimizing residual components including the lower oxides of metals, mainly by the simple components of metals and their saturated oxide components.
- a metal film is used as a starting material, and a reactive gas (O, O +
- the ratio of the residual component including the lower oxide of the metal can be suppressed. Since this ND filter contains a large proportion of a saturated oxide component in addition to a simple metal component, the thickness of the light absorption film can be made larger than that of a single metal light absorption film. This facilitates the design of the optical film of the ND filter, facilitates the control of the manufacturing process, and improves the reliability.
- the thickness of the absorbing film including the saturated oxide becomes thicker than that of the ND filter composed only of the metal film, so that the film thickness can be easily controlled and the reproducibility with high optical characteristics can be improved. I got it. Also, since there are few unstable components such as lower oxides in the absorbing film, the reliability of the ND filter is improved, and by adjusting the film forming conditions even at a low temperature, the optimal light for obtaining the ND characteristics is obtained. An absorbing film can be formed. Furthermore, since the starting material is an inexpensive metal, it is possible to produce an ND filter at low cost.
- FIG. 1 is a schematic cross-sectional view showing a layer configuration of an embodiment of an ND filter according to the present invention.
- FIG. 2 is a schematic block diagram showing a vacuum evaporation apparatus used for producing an ND filter according to the present invention.
- FIG. 3 is a table showing film forming conditions of an ND filter according to the present invention.
- FIG. 4 is an XPS spectrum diagram showing the composition of a light absorbing film included in the ND filter according to the present invention.
- FIG. 5 is a table showing a composition of a light absorbing film included in the ND filter according to the present invention.
- FIG. 6 is a table showing an element composition of a light absorbing film included in the ND filter according to the present invention.
- FIG. 7 is a graph showing optical characteristics of the ND filter according to the present invention.
- FIG. 8 is a schematic diagram showing an example in which the ND filter according to the present invention is applied to a light quantity diaphragm device for a camera.
- FIG. 9 is a schematic cross-sectional view showing a layer configuration of another embodiment of the ND filter according to the present invention.
- FIG. 10 is a schematic cross-sectional view showing a layer configuration of another embodiment of the ND filter according to the present invention.
- FIG. 11 is a schematic exploded perspective view showing another example in which the ND filter according to the present invention is applied to a light quantity diaphragm device for a camera.
- FIG. 1 is a schematic cross-sectional view showing the configuration of an embodiment of the thin-film ND filter according to the present invention.
- the ND filter 0 is a thin film type in which light absorbing films 3 and 5 and dielectric films 2, 4 and 6 are laminated on a transparent substrate 1.
- the composition of the light absorbing films 3 and 5 is 30% by weight of a single metal component and 50% by weight or more of a saturated oxide component of the metal, and the remaining components are the lower oxides of the metal. And the compound of the metal.
- the light absorbing films 3 and 5 can be formed by reactive physical vapor deposition (PVD) using a metal material as a raw material.
- PVD reactive physical vapor deposition
- metal raw material for the light-absorbing films 3 and 5 in addition to Ti, Cr, Ni and the like, alloy strengths such as NiCr, NiFe and NiTi can be selected.
- SiO or Al 2 O can be used for the dielectric films 2, 4, and 6.
- the anti-reflection function can be given to the ND filter by laminating the light absorbing films 3, 5 and the dielectric films 2, 4, 6 in a predetermined thickness and in a predetermined order.
- the thin film type ND filter having such a configuration is used for a light amount diaphragm device.
- the transparent substrate 1 has a PET (polyethylene terephthalate) force of 0.1 mm in thickness.
- PET polyethylene terephthalate
- the present invention is not limited to this, and a polyester film other than PET or a polycarbonate film can be used.
- a polyester film such as PET or a polycarbonate film is preferably used for the aperture stop, but a glass or a plastic which is transparent in the wavelength region to be used can be appropriately used as the transparent substrate 1 unless the application is particularly limited.
- the first dielectric film 2 formed on the transparent substrate 1 is made of SiO and has a physical thickness of 59 nm.
- the first light absorbing film 3 formed thereon is mainly composed of metal Ti and its saturated oxide TiO.
- the physical thickness of the first light absorbing film 3 is 28 nm.
- the second dielectric film 4 formed thereon is made of SiO, and its physical thickness is 5 lnm.
- the second light-absorbing film 5 formed thereon further comprises metal Ti and its saturated oxide TiO.
- Two components, and other lower components include lower oxides TiO, TiO and metal compound TiN.
- the physical thickness of the second light absorbing film 5 is 25 nm.
- the third dielectric film 6 formed thereon is made of SiO2 and has a physical thickness of 78 nm. Note that such a laminated configuration is an example
- a transparent ceramic material is usually expressed as a dielectric film at the wavelength used.
- the optical characteristics (reflection, transmission, polarization, phase, etc.) of the incident light can be freely adjusted. be able to.
- the ND filter has an anti-reflection function by adopting the layer configuration shown in FIG.
- the light absorbing film has a function of literally absorbing light in a used wavelength region, and usually uses a metal in a visible region. In the present invention, the optical and physical properties are improved, especially by introducing the saturated oxide into the metal.
- FIG. 2 is a schematic block diagram showing an example of a vacuum evaporation apparatus used for producing the ND filter shown in FIG.
- the present apparatus mainly includes a vacuum chamber 11, on which a film thickness monitor 12 and a film thickness controller 13 are mounted.
- a substrate holder 14 for supporting and fixing a substrate to be processed, a substrate 15 for film thickness measurement, and an evaporation source 16 are incorporated.
- the film thickness monitor 12 includes a light source, a spectroscope, and a light receiver. The light emitted from the spectroscope enters the film thickness measuring substrate 15, and the reflected light enters the photodetector. The output is sent to the film thickness controller 13. In this way, by monitoring the film thickness in real time, a light absorbing film or a dielectric film having a desired thickness is formed on the substrate.
- the chamber 11 is connected to a vacuum gauge section 17, a vacuum gauge control section 18, a gas introduction unit 19 and an exhaust unit 20.
- an APC method is employed to keep the degree of vacuum in the chamber 11 constant.
- feedback is provided via the vacuum gauge gauge section 17 and the vacuum gauge control section 18 to control the gas introduction unit 19 to adjust the amount of the mixed gas introduced into the chamber 11.
- the present invention is not limited to this, and a method may be adopted in which the amount of introduction is adjusted to a constant value with a needle valve.
- FIG. 3 is a table showing film forming conditions when the ND filter shown in FIG. 1 is produced using the vacuum deposition apparatus shown in FIG. As shown, the substrate temperature is 100 ° C. Moreover, the ultimate vacuum of the chamber is set to 1 X 10- 3 Pa.
- Ti is used as a raw material, and the vapor deposition rate is set to 0.5-1.
- air in which nitrogen and oxygen are mixed at a ratio of 4: 1 is used as a reactive gas to be introduced when Ti is deposited.
- the present invention is not limited to this.
- a mixed gas containing 50% or less of oxygen is used. For example, a mixture of O and N
- a mixed gas of O and Ar can be used in place of the 22 mixed gas.
- mixed gas containing oxygen can be used in place of the 22 mixed gas.
- Deposition vacuum in the case of introducing scan was set to 3- 4 X 10- 3 Pa.
- the present invention and the metal and its saturated acids has good optical properties and physical properties when kept constant between 1 X 10- 3 Pa- 1 X 10- 2 Pa to general Nag limited thereto It is possible to form a light-absorbing film in which the ratio of the remaining lower oxidant is controlled with the lower oxidant as a main component.
- SiO was used as a vapor deposition source, and the vapor deposition rate was 0.5-1.
- mZsec mZsec is set.
- a reactive gas is particularly introduced.
- the light absorption film is formed by using vacuum evaporation.
- a method capable of forming a dense film such as an ion plating method, an ion assist method, and a sputtering method may be used.
- FIG. 4 is a graph showing the results of analyzing the composition of a light absorbing film formed by reactive PVD under the conditions shown in FIG. This analysis was performed using an X-ray photoelectron spectrometer (XPS, ESCA). Irradiation of soft X-rays with specific energy to the surface of the absorbing film in a high vacuum causes the photoelectric effect. Electrons are also emitted from the sample force. This is guided to an analyzer, and detected as a spectrum by dividing it by the kinetic energy of electrons. Figure 4 shows this spectrum. Photoelectrons also emit deep region forces, but they lose their kinetic energy due to inelastic scattering before reaching the sample surface, so they are not detected as peaks and become the background of the spectrum.
- XPS X-ray photoelectron spectrometer
- the horizontal axis of the spectrum in Fig. 4 is displayed in terms of electron coupling energy.
- the binding energy is calculated as the difference between the energy of the irradiated soft X-ray and the kinetic energy of the photoelectron.
- the core electrons of various atoms have their own binding energy! /, So from the detected binding energy of the electrons, the type of element and the signal strength can be used to determine the element ratio.
- the spectrum in Figure 4 is the result of detecting the binding energy of the 2p inner-shell electrons of the atom.
- FIG. 5 is a table showing the composition of the light absorbing film calculated based on the analysis result shown in FIG. Looking at the ratio, metal Ti is 5%, TiOZTiN is 5%, Ti O power is 10%, TiO is 8
- the composition of the light absorbing film formed under the conditions shown in FIG. 3 includes a saturated oxide TiO as a main component, a simple Ti metal, and a low residual
- FIG. 6 shows an analysis result of the element ratio on the surface of the light absorbing film, which is also obtained by XPS.
- the element ratio of the light absorbing film was 53.8% for O, 27.5% for Ti, and 2.8% for N. Others Force containing 16.5% of C This is considered to be a residue of organic substances such as organic solvent and dirt left on the surface of the light absorbing film.
- FIG. 7 is a graph showing the optical characteristics of the ND filter when the layered structure shown in FIG. 1 is created under the film forming conditions shown in FIG.
- the horizontal axis shows the wavelength in the visible range, and the vertical axis shows the amount of light (%) representing the scale of reflectance and transmittance.
- the ND filter exhibited -eutral transmission characteristics in the visible region, and was able to produce an ND filter with low surface reflectance. Furthermore, when this ND filter was put into an environmental test, it was proved that it exhibited very good durability. In some cases, heat treatment or the like may be performed in an oxygen atmosphere in order to stabilize unstable components such as lower oxidation products contained in the light absorbing film.
- FIG. 8 is a schematic diagram showing an example in which the present ND filter is applied to a light amount diaphragm device for a camera.
- An ND filter 105 is fixed to the concave portion of the diaphragm blade 100, which is one of the pair formed, by an adhesive 106, heat welding, or the like.
- the aperture blade 100 is configured to rotate around a pivot pin 104 by a driving unit 103 to open and close the opening 101.
- FIG. 9 is a schematic cross-sectional view showing a layer configuration of another embodiment of the ND filter that is useful in the present invention.
- parts corresponding to the previous embodiment shown in FIG. 1 are denoted by corresponding reference numerals.
- a laminate is formed in which dielectric films 2, 4, 6 and light absorbing films 3, 5 are alternately stacked.
- An anti-reflection layer 7 is formed on another surface on the back side of the transparent substrate 1.
- the antireflection layer 7 is formed on a substrate surface different from the laminated surface of the ND filter 0 for the purpose of suppressing ghost and flare generated by an optical system in which the ND filter 0 is incorporated.
- the antireflection layer 7 as a single layer of a light absorbing film or a dielectric film, light reflection on a surface different from the laminated surface of the ND filter can be reduced.
- FIG. 10 is a schematic cross-sectional view showing a layer configuration of still another embodiment of the ND filter according to the present invention.
- an antireflection layer 7 is formed on the back surface of the transparent substrate 1.
- the raw material of the dielectric film 7b it is also possible to use other raw materials (eg, SiO, MgF) other than the raw materials used in the ND filter of the present invention.
- the raw material of the light absorbing film 7a is
- the antireflection layer 7 may be formed by mixing more types.
- the antireflection layer 7 can be formed as a single layer or a plurality of layers using a thermosetting resin or a photocurable resin that is transparent in a visible light region. However, if ghosts and flares are difficult to appear due to the optical system on which the ND filter is mounted, it is needless to say that the antireflection layer 7 is not necessarily provided.
- FIG. 11 is a schematic exploded perspective view showing another example in which the ND filter according to the present invention is applied to a light amount diaphragm device for a camera.
- the light amount diaphragm device for a camera basically includes a base plate 201, a filter blade 202, and a cover plate 203. These parts are assembled using pins 207.
- the base plate 201 has a circular opening 204 for restricting photographing light.
- the cover plate 203 has an opening 205 having a larger diameter than the main plate 201.
- a filter blade 202 is arranged in a blade chamber formed between the base plate 201 and the cover plate 203.
- the filter blade 202 is made of the ND filter according to the present invention, and has the same outer shape as a normally used diaphragm blade.
- the filter blade 202 is rotatably supported by a rotating shaft (not shown) provided on the base plate 203, and is configured to reciprocate between a position covering the openings 204 and 205 and a retracted position by the drive unit 206. Tepuru.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Ophthalmology & Optometry (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Optical Elements Other Than Lenses (AREA)
- Blocking Light For Cameras (AREA)
- Surface Treatment Of Optical Elements (AREA)
- Diaphragms For Cameras (AREA)
- Optical Filters (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/552,613 US7388723B2 (en) | 2003-11-14 | 2004-11-11 | ND filter and light quantity diaphragming device including the same |
JP2005515444A JPWO2005047940A1 (ja) | 2003-11-14 | 2004-11-11 | Ndフィルタ及びこれを用いた光量絞り装置 |
DE112004000723T DE112004000723T5 (de) | 2003-11-14 | 2004-11-11 | ND-Filter und Lichtmengenblendenvorrichtung einschließlich ND-Filter |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-384438 | 2003-11-14 | ||
JP2003384438 | 2003-11-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005047940A1 true WO2005047940A1 (ja) | 2005-05-26 |
Family
ID=34587322
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/016755 WO2005047940A1 (ja) | 2003-11-14 | 2004-11-11 | Ndフィルタ及びこれを用いた光量絞り装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7388723B2 (ja) |
JP (1) | JPWO2005047940A1 (ja) |
KR (1) | KR20060115324A (ja) |
CN (1) | CN100516938C (ja) |
DE (1) | DE112004000723T5 (ja) |
WO (1) | WO2005047940A1 (ja) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007083833A1 (ja) * | 2006-01-20 | 2007-07-26 | Sumitomo Metal Mining Co., Ltd. | 吸収型多層膜ndフィルターおよびその製造方法 |
JP2007206185A (ja) * | 2006-01-31 | 2007-08-16 | Canon Electronics Inc | Ndフィルタ |
JP2008180844A (ja) * | 2007-01-24 | 2008-08-07 | Sumitomo Metal Mining Co Ltd | 吸収型多層膜片面ndフィルター |
JP2008310016A (ja) * | 2007-06-14 | 2008-12-25 | Sumitomo Metal Mining Co Ltd | 耐熱遮光フィルムとその製造方法、及びそれを用いた絞り又は光量調整用装置 |
US7666527B2 (en) * | 2004-11-24 | 2010-02-23 | Sumitomo Metal Mining Co., Ltd. | Absorption type multi-layer film ND filter |
JP2013222203A (ja) * | 2012-04-13 | 2013-10-28 | Leica Microsystems (Schweiz) Ag | 顕微鏡にて傾斜照明を生成するための絞り装置と顕微鏡 |
WO2017145910A1 (ja) * | 2016-02-23 | 2017-08-31 | 東海光学株式会社 | プラスチック基材ndフィルタ及び眼鏡用プラスチック基材ndフィルタ |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006091694A (ja) * | 2004-09-27 | 2006-04-06 | Nidec Copal Corp | Ndフィルタ及びその製造方法と光量絞り装置 |
JP5114995B2 (ja) * | 2006-11-30 | 2013-01-09 | 住友金属鉱山株式会社 | 耐熱遮光フィルムとその製造方法、及びそれを用いた絞り又は光量調整装置 |
AU2010364232B2 (en) * | 2010-11-19 | 2014-09-04 | Siemens Concentrated Solar Power Ltd. | Solar energy absorptive coating, arrangement of the coating on a substrate, method for manufacturing the arrangement and use of the arrangement |
TW201338876A (zh) * | 2012-03-29 | 2013-10-01 | Juant Technology Co Ltd | 黑膜結構與黑膜結構之製造方法 |
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JP2002279685A (ja) * | 2001-03-16 | 2002-09-27 | Nippon Shinku Kogaku Kk | 光ピックアップ装置用絞りフィルタ |
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2004
- 2004-11-11 US US10/552,613 patent/US7388723B2/en not_active Expired - Fee Related
- 2004-11-11 DE DE112004000723T patent/DE112004000723T5/de not_active Withdrawn
- 2004-11-11 KR KR1020057020622A patent/KR20060115324A/ko not_active Application Discontinuation
- 2004-11-11 WO PCT/JP2004/016755 patent/WO2005047940A1/ja active Application Filing
- 2004-11-11 CN CNB2004800144750A patent/CN100516938C/zh not_active Expired - Fee Related
- 2004-11-11 JP JP2005515444A patent/JPWO2005047940A1/ja active Pending
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JP2002279685A (ja) * | 2001-03-16 | 2002-09-27 | Nippon Shinku Kogaku Kk | 光ピックアップ装置用絞りフィルタ |
JP2002350610A (ja) * | 2001-05-23 | 2002-12-04 | Sony Corp | 薄膜型ndフィルタおよびその製造方法 |
JP2002371236A (ja) * | 2001-06-14 | 2002-12-26 | Dainippon Printing Co Ltd | コーティング組成物、その塗膜、反射防止膜、反射防止フィルム、及び画像表示装置 |
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US7666527B2 (en) * | 2004-11-24 | 2010-02-23 | Sumitomo Metal Mining Co., Ltd. | Absorption type multi-layer film ND filter |
WO2007083833A1 (ja) * | 2006-01-20 | 2007-07-26 | Sumitomo Metal Mining Co., Ltd. | 吸収型多層膜ndフィルターおよびその製造方法 |
JPWO2007083833A1 (ja) * | 2006-01-20 | 2009-06-18 | 住友金属鉱山株式会社 | 吸収型多層膜ndフィルターおよびその製造方法 |
US7894148B2 (en) | 2006-01-20 | 2011-02-22 | Sumitomo Metal Mining Co., Ltd. | Absorption type multi-layer film ND filter and process for producing the same |
JP4692548B2 (ja) * | 2006-01-20 | 2011-06-01 | 住友金属鉱山株式会社 | 吸収型多層膜ndフィルターおよびその製造方法 |
JP2007206185A (ja) * | 2006-01-31 | 2007-08-16 | Canon Electronics Inc | Ndフィルタ |
JP2008180844A (ja) * | 2007-01-24 | 2008-08-07 | Sumitomo Metal Mining Co Ltd | 吸収型多層膜片面ndフィルター |
JP2008310016A (ja) * | 2007-06-14 | 2008-12-25 | Sumitomo Metal Mining Co Ltd | 耐熱遮光フィルムとその製造方法、及びそれを用いた絞り又は光量調整用装置 |
JP2013222203A (ja) * | 2012-04-13 | 2013-10-28 | Leica Microsystems (Schweiz) Ag | 顕微鏡にて傾斜照明を生成するための絞り装置と顕微鏡 |
WO2017145910A1 (ja) * | 2016-02-23 | 2017-08-31 | 東海光学株式会社 | プラスチック基材ndフィルタ及び眼鏡用プラスチック基材ndフィルタ |
JP2017151430A (ja) * | 2016-02-23 | 2017-08-31 | 東海光学株式会社 | プラスチック基材ndフィルタ及び眼鏡用プラスチック基材ndフィルタ |
US10663634B2 (en) | 2016-02-23 | 2020-05-26 | Tokai Optical Co., Ltd. | ND filter with plastic base material, and ND filter with plastic base material for eyeglasses |
Also Published As
Publication number | Publication date |
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CN1795401A (zh) | 2006-06-28 |
KR20060115324A (ko) | 2006-11-08 |
US20060279866A1 (en) | 2006-12-14 |
US7388723B2 (en) | 2008-06-17 |
JPWO2005047940A1 (ja) | 2007-05-31 |
CN100516938C (zh) | 2009-07-22 |
DE112004000723T5 (de) | 2008-03-06 |
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