JP3981676B2 - Filter for digital single-lens reflex camera - Google Patents

Description

The present invention relates to a filter for a digital single lens reflex camera.
The present invention relates to a filter lens that can be applied to a digital single lens reflex camera, and in particular, a protector filter for protecting a lens, a circular polarization filter, a light amount adjustment filter, a close-up filter for providing a special effect, and a cross-shaped light for a light source. The present invention relates to a configuration of a filter for a light effect and a filter lens for soft focus that can express a subject softly.

  With the spread of digital single lens reflex cameras, it has become possible to take a picture while directly checking the effect of the filter in the viewfinder.

  The present invention provides a digital camera filter that is most suitable for a digital single lens reflex camera, and in particular, a lens protection filter, a circular polarization filter, a light amount adjustment filter, a close-up filter that provides special effects, Providing a filter for streak effect that produces light and a filter lens for soft focus that can express the subject softly.

  The CCD / CMOS sensor, which is the image sensor of the digital camera, converts the light into electrical signals and records it, so it reads all the light, and the internal reflection, flare, ghost, etc. of the digital camera lens also degrade the image quality. It becomes a big cause.

  The lens of a digital single-lens reflex camera is composed of a combination of several lenses, and the lens reflects about 5% of the light on the lens surface unless a special low-reflection coating is applied. End up. When strong light enters the lens, the light reflected from the surface of each lens creates a flare while reflecting in a complicated manner inside the lens and inside the camera. Rings or balls of light that can be placed in a different location from the light source in the flare are called ghosts.

   Thus, in the digital single lens reflex camera filter according to the present invention, a low reflection coating is applied to the filter lens mounted in front of the lens of the digital camera to minimize flare and ghost. In addition, the outer periphery of the filter lens is smeared to suppress internal reflections to minimize flare and ghosting, and the filter lens frame has a satin finish to eliminate unnecessary reflections as much as possible. The best filter lens is provided.

  The present invention is preferably a multilayer film of silicon dioxide (SiO 2), magnesium fluoride (Mgf 2), aluminum oxide (Al 2 O 3), and zirconium oxide (ZrO 2) in the lens protection filter lens surface and the close-up filter lens surface coating. With a vacuum deposition system, the lens protection filter lens for digital single-lens reflex cameras with a non-reflective coating multilayer film formed on the filter lens surface can be easily enjoyed for close-up photography of flowers and accessories. We were able to provide a close-up filter lens for a digital single-lens camera.

  The present invention is preferably a digital single-lens reflex camera, in which a multilayer film of zirconium oxide (ZrO2) and silicon dioxide (SiO2) is vapor-deposited by an ion-assisted deposition method in the coating of a circularly polarizing filter lens surface. We were able to provide a circularly polarized filter lens for use.

  In addition, the present invention preferably applies aluminum oxide (Al2O3), magnesium fluoride (Mgf2), silicon dioxide (SiO2) in the coating of the soft focus filter lens surface, the lens surface of the light amount adjusting filter, and the lens surface of the light effect filter. ) Was deposited by a vacuum deposition apparatus, and a soft focus filter lens, a light amount adjustment filter lens, and a light effect filter lens for a digital single lens reflex camera could be provided.

  Furthermore, in the present invention, it is preferable that the lens protecting filter lens, the close-up filter lens, the circularly polarizing filter lens, the soft focusing filter lens, the light amount adjusting filter lens, and the light effect filter lens have black ink on the outer periphery of the small edge. We were able to provide a filter lens for a digital camera that was painted to minimize internal reflection at the edge of each filter lens.

  In the present invention, the lens protection filter lens, the close-up filter lens, the circular polarization filter lens, the soft focus filter lens, the light amount adjustment filter lens, and the frame on which the light effect filter is fitted have a satin finish. It was possible to provide a digital camera filter lens that eliminates unnecessary reflection from the frame.

  The present invention embodies a method of taking a picture while directly confirming the use effect of a filter in a finder with the spread of a digital single lens reflex camera, and provides a filter for a digital camera optimal for a digital single lens reflex camera. We were able to.

  That is, the filter for a digital single lens reflex camera in the present invention applies a low reflection coating to the filter lens mounted in front of the lens of the digital camera by an appropriate method, respectively, and minimizes flare and ghost caused by mounting the filter lens. I was able to suppress it.

  In addition, the present invention eliminates unnecessary reflection from the lens frame as much as possible by sanitizing the outer periphery of the filter lens to suppress internal reflection to minimize flare and ghosting, and to make the filter lens frame satin finish. The lens protection filter, circular polarization filter, light adjustment filter, close-up filter that brings special effects, and light effect filter that creates cross light on the light source, softening the subject We were able to provide a filter lens for soft focus that can be expressed.

  The present invention is a digital camera filter that is most suitable for a digital single lens reflex camera, in particular, a lens protection filter, a circular polarization filter, a light amount adjustment filter, a close-up filter that brings about a special effect, and a light that produces cross-shaped light as a light source. Specifically, a filter for a streak effect and a soft focus filter lens capable of expressing a subject softly are provided.

  The lens protection filter lens surface and the close-up filter lens surface coating according to the present invention are vacuum-deposited with a multilayer film of silicon dioxide (SiO2), magnesium fluoride (Mgf2), aluminum oxide (Al2O3), and zirconium oxide (ZrO2). The gist is to provide a lens protection filter lens for a digital single-lens reflex camera and a close-up filter lens that are vapor-deposited and coated with an apparatus to form a low-reflection coating film.

  The circularly polarizing filter lens surface coating according to the present invention is formed by vapor deposition coating of a multilayer film of zirconium oxide (ZrO2) and silicon dioxide (SiO2) by an ion-assisted deposition method, and is manufactured by an adhesion method to be heated. The gist is to provide a circular polarizing filter lens for a digital single-lens reflex camera in which a low-reflection coating film having a high film strength is formed by low-temperature processing on a weak circular polarizing lens.

  Furthermore, the soft focus filter lens surface, the light amount adjusting filter lens surface, and the light effect filter lens surface coating according to the present invention are coated with aluminum oxide (Al2O3), magnesium fluoride (Mgf2), and silicon dioxide (SiO2). The objective is to provide a soft focus lens, a light amount adjustment filter filter lens, and a light effect filter lens for a digital single lens reflex camera, in which a multilayer film of the above is vapor-deposited and coated with a vacuum deposition apparatus to form a low-reflection coating film It is said.

  The present invention provides the lens protecting filter lens, the close-up filter lens, the circularly polarized filter lens, the soft focus filter lens, the light amount adjusting filter lens, and the optical effect filter lens with a sanitized outer periphery. Another gist is that internal reflection at the filter lens edge is minimized.

  Further, the frame body for fitting the lens protection filter lens, the close-up filter lens, the circular polarization filter lens, the soft focus filter lens, the light amount adjustment filter lens, and the optical effect filter has a satin finish. It is a feature of the present invention that unnecessary reflection is eliminated.

  FIG. 1 and FIG. 2 illustrate Embodiment 1 of the present invention. FIG. 1 shows a filter lens assembly diagram for a digital single-lens reflex camera of the present invention, and FIG. 2 shows a shape after the assembly of FIG. FIG.

  1 and 2, reference numeral 1 denotes a filter frame body, 2 denotes a filter lens, and 3 denotes a lens pressing spring. The filter frame main body 1 has a lens fitting portion 4 to which the filter lens 2 is fitted, a lens holding inner step portion 5, a male screw 6 to be screwed to the digital camera barrel portion, and a fitting portion 7 for the lens holding spring 3. A female screw 8 is provided that enables screw connection of other optical system attachments.

  The filter main body 1 is plated on a metal material, the black alumite is chemically polished to roughen the surface, and the lens holding spring 3 has a black cupric oxide film finish. Unnecessary reflection from the main body 1 is eliminated as much as possible.

  Thus, the filter frame main body 1 described with reference to FIGS. 1 and 2 can be used as a lens protection filter lens, a soft focus filter lens, a light amount adjustment filter lens, and the like. Each of the lens outer peripheral edge portions 9 of the filter lens 2 to be set is sanitized to suppress internal reflection from the filter lens outer peripheral edge portion 9 to the limit.

  FIGS. 3 and 4 illustrate the second embodiment of the present invention. FIG. 3 shows a filter lens assembly diagram for the digital single-lens reflex camera of the second embodiment, and FIG. 4 shows a state after the assembly of FIG. It is a partial sectional view showing a shape.

  3 and 4, 10 is a filter rotating frame, 11 is a washer, 12 is a filter lens, and 13 is a base frame. The filter rotating frame 10 has a lens fitting portion 14 to which the filter lens 12 is fitted, a lens pressing inner step portion 15, a washer fitting portion 16, and a female screw 17 that enables screw connection of other optical system attachments. Is provided.

  The base frame 13 is provided with a fitting portion 18 of the filter lens 12 and a male screw 19 for screwing into the digital camera barrel portion. The filter rotating frame 10 and the base frame 13 are all plated with a metal material and have a satin finish with a chemically polished black alumite to roughen the surface. Unnecessary reflections in are removed as much as possible.

  Thus, the filter rotating frame 10 described with reference to FIGS. 3 and 4 can be used for a circularly polarizing filter lens, a light effect filter lens, and the like, and the filter lens 12 set in the filter rotating frame 10. Each of the lens outer peripheral edge portions 20 is blackened to suppress internal reflection from the filter lens outer peripheral edge portion 20 to the limit.

  FIGS. 5 and 6 illustrate the third embodiment of the present invention. FIG. 5 shows a filter lens assembly diagram for the digital single-lens reflex camera of the third embodiment, and FIG. 6 shows a state after the assembly of FIG. It is a partial sectional view showing a shape.

  5 and 6, 21 is a filter lens frame, 22 is a filter lens, and 23 is a lens holding ring. The filter lens frame 21 is a female that enables screw connection of a lens fitting portion 24 to which the filter lens 22 is fitted, a lens holding inner step portion 25, a lens holding ring fitting portion 26, and other optical system attachments. A screw 27 and a male screw 28 for screwing onto the digital camera barrel are provided.

  The filter lens frame 21 is plated with a metal material, and a satin finish in which the black alumite is chemically polished to roughen the surface, and the lens pressing ring 23 has a black cupric oxide film finish. Unnecessary reflections from the filter lens frame 21 and the like are eliminated as much as possible.

  Thus, the filter lens frame 21 described with reference to FIGS. 5 and 6 can be used for a close-up filter lens, and the lens outer peripheral edge portion 29 of the filter lens 22 set in the filter lens frame 21 is black. The inner surface reflection from the filter lens outer peripheral edge portion 29 is suppressed to the limit.

  Thus, the present invention is a digital camera filter that is most suitable for a digital single lens reflex camera, in particular, a lens protection filter, a circular polarization filter, a light amount adjustment filter, a close-up filter that provides special effects, and a cross-shaped light as a light source. In particular, it has been able to provide a filter for light effect and a soft focus filter lens that can express a subject softly, and has great industrial utility value.

It is assembly explanatory drawing which shows Example 1 of this invention. It is a partial cross section explanatory view explaining Example 1 of the present invention. It is assembly explanatory drawing which shows Example 2 of this invention. It is a partial cross section explanatory drawing explaining Example 2 of this invention. It is assembly explanatory drawing which shows Example 3 of this invention. It is a partial cross section explanatory drawing explaining Example 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Filter frame main body 2 Filter lens 3 Lens holding spring 4 Lens fitting part
5 Lens holding inner step 6 Male screw 7 Fitting
8 Female thread 9 Lens outer edge 10 Filter rotating frame 11 Washer 12 Filter lens 13 Base frame 14 Lens fitting part 15 Lens pressing inner step part 16 Washer fitting part 17 Female screw 18 Fitting part 19 Male screw 20 Filter lens outer circumference Small edge portion 21 Filter lens frame 22 Filter lens 23 Lens holding ring 24 Lens fitting portion 25 Lens holding inner step portion 26 Lens holding ring fitting portion 27 Female screw 28 Male screw 29 Lens outer peripheral small edge portion

Claims (3)

The lens protection filter lens surface and the close-up filter lens surface are coated with a multilayer coating of silicon dioxide (SiO2), magnesium fluoride (Mgf2), aluminum oxide (Al2O3), and zirconium oxide (ZrO2) using a vacuum evaporation system. By forming a multilayer film of antireflective coating on the filter lens surface for lens protection as well as the close-up filter lens surface,
Further, the lens protection filter lens and the close-up filter lens lens are painted with a small outer peripheral surface, and the internal reflection at each filter lens is reduced to the limit,
The lens body to which the lens protecting filter lens and the close-up filter lens are fitted has a satin finish, and unnecessary reflection from the frame body is eliminated.
Filter lens for digital single-lens reflex cameras. The circularly polarizing filter lens surface is coated with a multilayer film of zirconium oxide (ZrO2) and silicon dioxide (SiO2) by vapor deposition coating using the ion-assisted deposition method. Forming,
In addition, the outer peripheral facet of the circularly polarized filter lens is sanitized and the internal reflection at the filter lens facet is suppressed to the limit,
The frame body on which the circularly polarizing filter lens is fitted has a satin finish, and unnecessary reflection from the frame body is eliminated.
Filter lens for digital single-lens reflex cameras. The filter lens surface for soft focus, the lens surface of the light adjustment filter, and the lens surface of the light effect filter are coated with a multilayer film of aluminum oxide (Al2O2), magnesium fluoride (Mgf2), and silicon dioxide (SiO2) in a vacuum evaporation system. Forming a multilayer film of non-reflective coating on the lens surface of the soft focus filter lens, the lens surface of the light amount adjusting filter, and the lens surface of the light effect filter by vapor deposition coating,
In addition, the soft focus filter lens, the light amount adjustment filter lens, and the optical effect filter lens are smeared on the outer edge of the lens, and the internal reflection at each filter lens edge is minimized.
The frame for fitting the soft focus filter lens, the light amount adjustment filter lens, and the optical effect filter lens has a satin finish, and unnecessary reflection from the frame is eliminated.
Filter lens for digital single-lens reflex cameras.

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