JP2013114011A - Special filter for use in digital cameras and manufacturing method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter having functions to present a variety of special effects including those of a special filter to be used fitted to the front face of the lens barrel of a digital single-lens reflex camera, a soft filter for achieving a soft focusing effect, and a cross filter for obtaining a striation effect.SOLUTION: A filter lens is configured by having two front and rear round filter lens bases hold a filter material between them; the front and rear round filter lens bases are stuck to each other with adhesive on the circumference of the filter lens holding the filter material within; and the circumferential edge of the filter lens is covered and sealed with synthetic resin. In this way, the filter lens is so formed as to integrate the front round filter lens base, the filter material and the rear round filter lens base.

Description

The present invention relates to a special filter for a digital camera and a manufacturing method thereof.

The special filter for a digital camera in the present invention relates to a filter that produces various special effects, such as a soft filter that obtains a soft focus effect and a cross filter that obtains a streak effect. A filter with a function that produces a filter or a similar new effect is provided, and the method for producing a special filter in the present invention can provide a special filter that produces various special effects efficiently and inexpensively. is there.

An invention relating to a film unit with a lens having a photographing effect function of a special filter in a so-called film type camera (also called a disposable camera or a single use camera) is disclosed in Japanese Patent Laid-Open No. 10-232461 (hereinafter referred to as Patent Document 1). ing.

Thus, in the description of the prior art in Patent Document 1, various special filters that produce various special effects by being attached to a photographing lens at the time of photographing are known. Among such special filters, a cross filter that generates radial light from the vicinity of a bright light source, a soft filter that generates flare on the entire screen and makes a soft photograph, and the like are generally commercially available. Such a soft filter can be used to shoot a person as a subject with a soft image, especially for portrait photography. It has the effect of making it inconspicuous and is often used by professional photographers.

In addition, some interchangeable lenses for single-lens reflex cameras generate spherical aberration by changing the distance between some of the lenses, and have the same effect as the soft filter as described above. In general, a compact camera having a soft photographing mode in which a soft filter is removably incorporated is also provided. It is explained that these interchangeable lenses and cameras have a shooting mode switching function so that they can be switched to a normal sharp shooting mode when soft shooting is not required. The function, usage, and usage of a special filter are described.

Furthermore, the technical background at the time when the invention of Patent Document 1 was made is that a special effect shooting by a soft filter or the like is rarely used except by professional photographers and high-level amateur users. For users, the use of such a soft filter is not well known for proper usage, and there are not many opportunities to use it at present. It was recognized that there was a lot of need to use if you could shoot soft effects.

Thus, the object of the invention of Patent Document 1 is to take a picture with a special effect in a lens-fitted photo film unit containing a non-exposed photographic film and incorporating a simple picture taking unit comprising a picture taking lens, a finder, and a shutter device. It is simple and low-cost, and its configuration is one in which fine irregularities that generate flare are integrally formed on the curved surface of the photographic lens, and one that forms minute filaments on the curved surface of the photographic lens. Any one of the optical systems constituting the viewfinder is subjected to a process for obtaining a visual sense similar to a special photographing effect that can be provided by the photographing lens.

Therefore, in the prior art described in Patent Document 1, in a lens-fitted photo film unit with a built-in photographing unit, fine irregularities for generating flare are integrally provided on the curved surface of the photographing lens, or on the curved surface of the photographing lens. It is said that by forming fine filaments integrally, it is possible to easily perform shooting that produces special effects at low cost, but fine unevenness is integrally provided on the shooting lens curved surface of the film unit with lens In addition, the method of forming fine filaments on the curved surface of the photographic lens can be greatly evaluated in terms of expanding the versatility and functionality of film units with lenses (disposable cameras and single-use cameras). The film unit with a lens has a major disadvantage of being single-use. It can not be used in the camera.

Thus, the present invention relates to a special filter such as a soft filter or a cross filter that is used by being mounted on the front surface of a lens barrel of a digital single-lens reflex camera. This is because digital single-lens reflex cameras are sold at a price range that is easy to purchase for the general population, and a large number of amateur camera enthusiasts including women and the elderly have increased.

Further, in the present invention, in a digital single-lens reflex camera, a photographing element (optical sensor) that converts an image, which is an optical signal, into an electrical signal is equipped with a CCD image sensor or a CMOS image sensor, and has high sensitivity. Signals can be accurately captured as digital data, and its expressive power enables amateur camera enthusiasts to make many wonderful works and photographs, and those amateur camera enthusiasts There is a present situation in which people possess the characteristics and functions of various interchangeable lenses and various filters as knowledge, and select and use the interchangeable lenses and various filters on a daily basis.

      Patent Document 1 JP 10-232461 A

The problems to be solved by the present invention are various special filters such as a special filter that is used by attaching to the front surface of a lens barrel of a digital single lens reflex camera, that is, a soft filter that obtains a soft focus effect or a cross filter that obtains a light stripe effect A filter with a function that produces an effect is provided, and the method for producing a special filter according to the present invention can provide a special filter that produces various special effects efficiently and inexpensively.

The present invention constitutes a filter lens by sandwiching a filter material between two circular filter lens front substrates and a circular filter lens rear substrate disposed at least front and rear with respect to the optical axis of the filter lens, After adhering the circular filter lens front substrate and the circular filter rear substrate with an adhesive at the circumference of the filter lens sandwiching the filter material, the circular edge of the filter lens is formed with a synthetic resin material. By sealing the cover, a filter lens is formed by integrating the circular filter lens front substrate, the filter material, and the circular filter rear substrate, and the filter lens is fitted in a filter frame to be a special filter. Is used by attaching to the front surface of a lens barrel of a digital single lens reflex camera.

The present invention also comprises a filter lens having a filter material sandwiched between two circular filter lens front substrates and a circular filter lens rear substrate disposed at least front and rear with respect to the optical axis of the filter lens. The circular filter lens front substrate and the circular filter lens rear substrate are bonded to each other through a spacer at a circumferential portion of the filter lens sandwiching the filter material, and then the circular filter lens The circular filter lens front substrate, the filter material, the spacer, and the circular filter lens rear substrate are formed by covering and sealing the edge portion formed by the front substrate, the spacer, and the circular filter lens rear substrate with a synthetic resin material. An integrated filter lens is formed, and the filter lens is a filter. Is fitted to form a special filter within, it is used by attaching to the lens barrel front of the digital single-lens reflex camera.

In the present invention, the filter material C is made of a paper or paper that is patterned with lines, dots, circles, squares, triangles, etc., at a site that transmits light, a site that transmits light a little, and a site that does not transmit light at all. By using cloth, resin sheet, glass, and film or resin net, it has new special effects as well as special effects such as conventional soft filter for soft focus effect and cross filter for optical effect. A filter can be obtained.

In the present invention, the filter material C includes a hole-shaped portion that transmits light and a plate-shaped portion that does not transmit light at all, and the hole-shaped portion that transmits light is a stainless plate, an aluminum plate, or a copper plate. Special slits, small holes, or circles, squares, triangles, etc., with special patterns such as conventional soft filters for obtaining soft focus effects and cross filters for obtaining optical effects. A filter having a new special effect as well as an effect can be obtained.

Thus, the manufacturing method of the special filter according to the present invention includes a filter material between two circular filter lens front substrates and a circular filter lens rear substrate disposed at least in front of and behind the optical axis of the filter lens. The filter lens is configured by sandwiching the circular filter lens front substrate and the circular filter rear substrate with an adhesive at the circumferential portion of the filter lens sandwiching the filter material. Cover the edge of the ring with a synthetic resin material, or between the two circular filter lens front substrate and the circular filter lens rear substrate arranged at least in front of and behind the optical axis of the filter lens. A filter lens is formed by sandwiching a filter material, and the circumference of the filter lens sandwiching the filter material After the circular filter lens front substrate and the circular filter lens rear substrate are bonded to each other with an adhesive through a spacer, the circular filter lens front substrate, the spacer, and the circular filter lens rear substrate are formed. A filter lens is manufactured by a method of integrating the circular filter lens front substrate, the filter material, the spacer, and the circular filter rear substrate by covering and sealing the circular edge portion with a synthetic resin material.

Therefore, the present invention forms a filter lens by sandwiching a filter material between at least two circular filter lens front substrates and a circular filter lens rear substrate disposed on the optical axis of the filter lens. By adhering the circular filter lens front substrate and the circular filter lens rear substrate with an adhesive at the circumference of the filter lens sandwiching the material, the circular filter lens front substrate, the filter material, and the circular filter This is a filter lens that integrates the rear substrate of the lens. Like a conventional special filter, a metal material is welded to the filter lens substrate at high temperatures such as sputtering and vapor deposition during the manufacturing process, and the filter The lens substrate can be manufactured integrally or directly on the filter lens substrate. Article eliminates the need to be modified such that engraved, good filter accuracy can maintain the smoothness of the filter lens substrate can be manufactured.

Further, the present invention has a configuration in which the filter element is sandwiched between at least two circular filter lens front substrates and a circular filter lens rear substrate. The filter elements transmit light, transmit light slightly, and transmit light completely. Paper or cloth patterned with lines, dots, circles, squares, triangles, etc., resin sheets, glass, film or resin nets, and hole shapes that transmit light And a plate-like part that does not transmit light at all, and the hole-shaped part that transmits light is patterned into a slit, small hole, round, square, or triangular shape on a stainless steel plate, aluminum plate, or copper plate, etc. A new special filter that produces various special effects as well as soft filters and cross filters can be selected. It is possible to provide a Luther.

In the present invention, the filter element is sandwiched between at least two circular filter lens front substrates and the circular filter lens rear substrate, so that the filter elements are circular filters as in the conventional manufacturing process of this type of filter. Between the lens front substrate and the circular filter lens rear substrate, it is not configured to apply and bond an adhesive on the entire surface, so it can be bonded without generating bubbles on each bonding surface, very much Since a filter lens can be easily and efficiently manufactured, a special filter can be provided at a low cost.

(A) It is an assembly component figure explaining Example 1 of this invention. (B) It is sectional drawing explaining Example 1 of this invention. (A) It is an assembly components figure explaining Example 2 of this invention. (B) It is sectional drawing explaining Example 2 of this invention. (A) It is an assembly parts figure of the special filter lens mounting frame of this invention. (B) It is principal part sectional drawing of the special filter lens mounting frame of this invention. (A) It is explanatory drawing which shows the pattern a of the filter element used for this invention. (B) It is explanatory drawing which shows the pattern b of the filter element used for this invention. (C) It is explanatory drawing which shows the pattern c of the filter element used for this invention. (A) It is explanatory drawing which shows the pattern d of the filter element used for this invention. (B) It is explanatory drawing which shows the pattern e of the filter element used for this invention. (C) It is explanatory drawing which shows the pattern f of the filter element used for this invention.

The present invention relates to a special filter for a digital camera and a manufacturing method thereof. The present invention relates to a special filter such as a soft filter or a cross filter that is used by being mounted on the front surface of a lens barrel of a digital single lens reflex camera. The technical background of the present invention is a recent digital single lens reflex camera. This is due to the increase in the number of amateur camera enthusiasts, including women and senior citizens, that are sold at prices that are easy to purchase for the general population.

Further, in the present invention, in a digital single-lens reflex camera, a photographing element (optical sensor) that converts an image, which is an optical signal, into an electrical signal is equipped with a CCD image sensor or a CMOS image sensor, and has high sensitivity. Signals can be accurately captured as digital data, and the expressive power that makes full use of its resolution and performance enables amateur camera enthusiasts to make many wonderful works and photographs. Amateur camera enthusiasts have the characteristics and functions of various interchangeable lenses and various filters as knowledge, and have started to select and use these interchangeable lenses and various filters on a daily basis.

Thus, the present invention provides a filter lens having a filter material sandwiched between two circular filter lens front substrates and a circular filter lens rear substrate disposed at least front and rear with respect to the optical axis of the filter lens. The circular edge of the filter lens is synthesized by adhering the circular filter lens front substrate and the circular filter rear substrate with an adhesive at the circumference of the filter lens sandwiching the filter material. It is preferable to form a filter lens in which the circular filter lens front substrate, the filter material, and the circular filter rear substrate are integrated by cover sealing with a resin material.

The present invention also comprises a filter lens having a filter material sandwiched between two circular filter lens front substrates and a circular filter lens rear substrate disposed at least front and rear with respect to the optical axis of the filter lens. The circular filter lens front substrate and the circular filter lens rear substrate are bonded to each other through a spacer at a circumferential portion of the filter lens sandwiching the filter material, and then the circular filter lens The circular filter lens front substrate, the filter material, the spacer, and the circular filter lens rear substrate are formed by covering and sealing the edge portion formed by the front substrate, the spacer, and the circular filter lens rear substrate with a synthetic resin material. It is preferable to form an integrated filter lens.

In the present invention, the filter material is a paper or cloth in which a part that transmits light, a part that transmits light a little, and a part that does not transmit light at all are patterned with lines, dots, circles, squares, triangles, or the like. Filters with new special effects as well as special effects such as conventional soft filters that obtain soft focus effects and cross filters that obtain optical effects by using resin sheets, glass, and film or resin nets It is preferable to obtain a configuration.

In the present invention, the filter material includes a hole-shaped portion that transmits light and a plate-shaped portion that does not transmit light at all, and the hole-shaped portion that transmits light includes a stainless steel plate, an aluminum plate, a copper plate, or the like. Special effects such as a conventional soft filter for obtaining a soft focus effect and a cross filter for obtaining an optical effect by making a slit, a small hole, or a patterned shape such as a circle, square or triangle. Of course, it is preferable to obtain a filter having a new special effect.

Furthermore, the manufacturing method of the special filter according to the present invention includes a filter material between two circular filter lens front substrates and a circular filter lens rear substrate arranged at least in front of and behind the optical axis of the filter lens. A filter lens is formed by sandwiching, and the circular filter lens front substrate and the circular filter rear substrate are bonded with an adhesive at the circumferential portion of the filter lens sandwiching the filter material, and then the filter lens Cover seal the edge with synthetic resin material, or filter between two circular filter lens front substrate and circular filter lens rear substrate arranged at least front and back with respect to the optical axis of the filter lens A filter lens is configured by sandwiching the material, and the circumference of the filter lens sandwiching the filter material After the circular filter lens front substrate and the circular filter lens rear substrate are bonded to each other with an adhesive through a spacer, the circular filter lens front substrate, the spacer, and the circular filter lens rear substrate are formed. It is preferable to manufacture the filter lens by a method of integrating the circular filter lens front substrate, the filter material, the spacer, and the circular filter rear substrate by covering and sealing the circular edge portion with a synthetic resin material.

Thus, the present invention does not stick the entire filter material between the front substrate of the two filter lenses and the rear substrate of the circular filter lens using an adhesive, as in the conventional filter lens, A filter lens is formed by sandwiching a filter material between at least two circular filter lens front substrates and a circular filter lens rear substrate, and the circular shape is formed at the circumferential portion of the filter lens sandwiching the filter material. The filter lens front substrate and the circular filter lens rear side are bonded to form a filter lens in which the circular filter lens front substrate, the filter material, and the circular filter lens rear substrate are integrated.

And, the present invention can be integrally manufactured by welding a metal material in a concavo-convex shape at a high temperature state such as sputtering or vapor deposition on the filter lens substrate during the manufacturing process like a conventional special filter. Thus, it is not necessary to directly engrave fine filaments, and the smoothness of the filter lens substrate can be maintained during the production process, and a highly accurate filter can be produced.

Further, the present invention has a configuration in which a filter element is sandwiched between at least two circular filter lens front bases and a circular filter lens rear base, and the filter elements transmit light, transmit light slightly, and transmit light completely. Paper or cloth patterned with lines, dots, circles, squares, triangles, etc., resin sheets, glass, film or resin nets, and hole shapes that transmit light And a plate-like part that does not transmit light at all, and the hole-shaped part that transmits light is patterned into a slit, small hole, round, square, or triangular shape on a stainless steel plate, aluminum plate, or copper plate, etc. A new special filter that produces various special effects as well as soft filters and cross filters can be selected. It is possible to provide a Luther.

Since the present invention has a configuration in which the filter element is sandwiched between at least two circular filter lens front bases and circular filter lens rear bases arranged on the optical axis of the filter lens, this type of conventional filter This eliminates the difficult process of bonding the filter element between the front substrate of the circular filter lens and the back substrate of the circular filter lens via an adhesive without generating bubbles, making the filter lens very simple and efficient. Therefore, it is possible to provide an inexpensive and highly accurate special filter.

In FIG. 1, FIG. 1 (A) is an assembly part diagram for explaining the first embodiment of the present invention, and FIG. 1 (B) is a sectional view for explaining the first embodiment of the present invention. 1A and 1B, reference numeral 1 denotes an optical axis of a filter lens, 2 denotes a circular filter lens front substrate, 3 denotes a circular filter lens rear substrate, and 4 denotes a filter element.

FIG. 1B shows a filter lens 5 formed by sandwiching a filter element 4 between a circular filter lens front substrate 2 and a circular filter lens rear substrate 3, and the filter lens 5 is bonded to its circumferential portion 6. The circular filter lens front substrate 2, the circular filter lens rear substrate 3, and the circular edge 8 of the filter lens 5 are attached to the circular filter lens front substrate 2, the acrylic resin, the silicone resin, or the thermoplastic resin. A cover seal 9 made of a synthetic resin material such as an elastomer resin is fitted as a coating, sticking or molding material.

Thus, in the first embodiment, the filter element 4 is disposed between the two circular filter lens front substrates 2 and the circular filter lens rear substrate 3 that are disposed at least front and rear with respect to the optical axis 1 of the filter lens. The filter lens 5 is sandwiched and the filter element 5 is sandwiched, and the circular filter lens front substrate 2 and the circular filter rear substrate 3 are bonded to each other with an adhesive 7 at the circumferential portion 6 of the filter lens 5 sandwiching the filter element 4. After that, the circular filter lens front substrate 2, the filter material 4, and the circular filter rear substrate 3 are integrated by covering the circular edge 8 of the filter lens 5 with a synthetic resin cover seal 9. A special filter for a digital camera having a filter lens 5 is provided.

FIGS. 3A and 3B show a specific example for forming a filter lens frame for detachably attaching the filter lens 5 described above to the front surface (not shown) of a lens barrel of a digital single lens reflex camera. 3A is an assembly part diagram for explaining the filter lens mounting frame, and FIG. 3B is an enlarged cross-sectional view of a main part for explaining the filter lens mounting frame.

3 (A) and 3 (B), 1 is the optical axis of the filter lens, 5 is the filter lens, 10 is the front frame, 11 is the rotating part washer, 12 is the rear frame, A female screw 13 for attaching other attachments, a filter lens fitting portion 14, and a fitting groove 15 a of the rotating portion washer 11 are engraved, and the rear frame 12 is similarly provided with the rotating portion washer 11 interposed therebetween. A fitting groove 15b that can rotatably mount the front frame 10 to the rear frame 12 is formed.

Reference numeral 16 denotes an assembled filter lens mounting frame. Reference numeral 17 denotes a male screw for detachably mounting the filter lens mounting frame 16 on the front surface of the camera lens barrel. The mounting frame is a so-called double frame shape in which the front frame 10 fitted with the filter lens 5 can rotate around the optical axis 1 of the filter lens when the rear frame 12 is screwed to the front surface of the lens barrel of the camera lens. Is often used.

In FIG. 2, FIG. 2 (A) is an assembly part diagram for explaining the second embodiment of the present invention, and FIG. 2 (B) is a sectional view for explaining the second embodiment of the present invention. 2A and 2B, reference numeral 1 denotes an optical axis of a filter lens, 2 denotes a circular filter lens front substrate, 3 denotes a circular filter lens rear substrate, 4 denotes a filter element, and 18 denotes a spacer. .

In FIG. 2B, a filter element 4 is sandwiched between a circular filter lens front substrate 2 and a circular filter lens rear substrate 3 to form a filter lens 5, and the filter lens 5 is formed on the circumferential portion 6. The circular filter lens front substrate 2 and the circular filter rear substrate 3 are bonded to both surfaces of the spacer 18 through a synthetic resin or metal spacer 18 that compensates for the thickness of the filter element 4. 7b, and the circular filter lens front substrate 2, the circular filter lens rear substrate 3, and the circular edge 8 of the filter lens 5 are acrylic resin, silicone resin, or thermoplastic. A cover seal 9 made of a synthetic resin material such as an elastomer resin is fitted as a coating, sticking or molding material.

Thus, in the second embodiment, the filter element 4 is disposed between the two circular filter lens front substrates 2 and the circular filter lens rear substrate 3 that are disposed at least front and rear with respect to the optical axis 1 of the filter lens. The filter lens 5 is sandwiched and the filter element 5 is sandwiched between the circular filter lens front substrate 2 and the circular filter lens rear substrate 3 via a spacer 18 at the circumferential portion 6 of the filter lens 5. After adhering to each other with an adhesive, the circular filter lens front substrate 2, the spacer 18, and the circular edge 8 formed by the circular filter lens rear substrate 3 are covered with a synthetic resin material 9. A filter in which the circular filter lens front substrate 2, the filter element 4, the spacer 18 and the circular filter lens rear substrate 3 are integrated. Providing special filter for digital camera lens 5 form.

The filter lens 5 having the configuration of the second embodiment is mounted on the filter lens mounting frame as shown in FIGS. 3A and 3B as in the first embodiment. 3 (A) and 3 (B), 1 is the optical axis of the filter lens, 5 is the filter lens, 10 is the front frame, 11 is the rotating part washer, 12 is the rear frame, A female screw 13 for attaching other attachments, a filter lens fitting portion 14, and a fitting groove 15 a of the rotating portion washer 11 are engraved, and the rear frame 12 is similarly provided with the rotating portion washer 11 interposed therebetween. A fitting groove 15b that can rotatably mount the front frame 10 to the rear frame 12 is formed.

Reference numeral 16 denotes an assembled filter lens mounting frame. Reference numeral 17 denotes a male screw for detachably mounting the filter lens mounting frame 16 on the front surface of the camera lens barrel. The mounting frame is a so-called double frame shape in which the front frame 10 fitted with the filter lens 5 can rotate around the optical axis 1 of the filter lens when the rear frame 12 is screwed to the front surface of the lens barrel of the camera lens. Is often used.

Thus, FIGS. 4A, 4B, and 4C are explanatory views showing patterns a, b, and c of the filter element 4 used in the present invention. 5A, 5B, and 5C are explanatory views showing patterns d, e, and f of the filter element 4 used in the present invention.

4 or 5, the figure shows a front view of the filter lens mounting frame, and the patterns a to f of the filter elements 4 are disposed in the front frame 10 of the filter via the transparent circular filter lens front substrate 2. Is installed.

FIG. 4A shows the filter element 4 made of, for example, glass or a synthetic resin material, and the surface of the filter element 4 is provided with a fine uneven pattern a by vacuum deposition, sputtering, or fine etching. Thus, a special effect like a soft filter is obtained, and the filter element 4 has a configuration of being sandwiched between the circular filter lens front substrate 2 and the circular filter lens rear substrate 3.

FIG. 4 (B) shows a cross filter special pattern, in which the filter element 4 is made of glass or a synthetic resin material, and fine lines are engraved or printed on the filter element 4. The filter element 4 is configured to be sandwiched between the circular filter lens front substrate 2 and the circular filter lens rear substrate 3.

In FIG. 4C, the filter element 4 is made of glass or a synthetic resin material, and a pattern c is provided by engraving or printing fine stripes of mesh on the filter element 4 to form a cross filter. The filter element 4 has a configuration of being sandwiched between the circular filter lens front substrate 2 and the circular filter lens rear substrate 3.

Thus, in one example of Example 3, the filter element 4 has a pattern in which a part that transmits light, a part that transmits light a little, and a part that does not transmit light at all are lines, dots, circles, squares, triangles, or the like. Paper, cloth, resin sheet, glass, and film or resin net, and depending on how the filter element 4 is used, it is possible to obtain a filter lens that generates new light flare. it can.

5A, 5B, and 5C show that the filter element 4 is made of, for example, a stainless thin plate, an aluminum thin plate, or a copper plate material, and the surface of the filter element 4 is etched or laser processed. A hole is provided with perforation patterns d, e, and f, and a special effect like a soft filter is obtained. The filter element 4 is provided between the circular filter lens front substrate 2 and the circular filter lens rear substrate 3. It has the structure pinched | interposed into.

Therefore, the filter element 4 is composed of a hole-shaped part that transmits light and a plate-shaped part that does not transmit light at all. The hole-shaped part that transmits light has a slit or a stainless plate, an aluminum plate, a copper plate, or the like. Depending on how the filter element 4 is used, it is possible to obtain a filter lens that generates a flare of a new light beam, which has a small hole or a patterned shape such as a circle, square, or triangle.

Thus, according to the method of manufacturing the special filter of the present invention, as shown in FIG. 1 and FIG. The filter element 4 is sandwiched between the mold filter lens rear substrate 3 to form the filter lens 5, and the circular filter lens front substrate 2 and the circle are formed at the circumferential portion 6 of the filter lens 5 sandwiching the filter element 4 After the mold filter rear substrate 3 is bonded with the adhesive 7, the edge 8 of the filter lens 5 is covered with a synthetic resin cover seal 9, or at least before and after the optical axis 1 of the filter lens. The filter element 4 is sandwiched between the two circular filter lens front substrates 2 and the circular filter lens rear substrate 4 arranged on the filter lens. The circular filter lens front substrate 2 and the circular filter lens rear substrate 3 are connected to each other through a spacer 18 at the circumferential portion 6 of the filter lens 5 sandwiching the filter element 4 with the adhesives 7a and 7b. The circular filter lens front side substrate 2, the spacer 18, and the circular edge portion 8 formed by the circular filter lens rear side substrate 3 are covered with a synthetic resin material cover seal 9, to thereby form the circular filter. The filter lens is configured by a method in which the lens front substrate 2, the filter material 4, the spacer 18, and the circular filter rear substrate 3 are integrated.

In the present invention, a filter material 4 is sandwiched between at least two circular filter lens front substrates 2 and a circular filter lens rear substrate 3 disposed on the optical axis 1 of the filter lens. The circular filter lens front substrate 2 and the circular filter lens rear substrate 3 are bonded with an adhesive 7 at the circumferential portion 6 of the filter lens 5 sandwiching the filter material 4, thereby forming a circular shape. The filter lens 5 is formed by integrating the filter lens front substrate 2, the filter material 4, and the circular filter lens rear substrate 2, and is sputtered on the filter lens substrate during the manufacturing process like a conventional special filter. We can manufacture a filter lens substrate in one piece by welding a metal material in a concavo-convex shape at a high temperature such as vapor deposition or Processing such that engraved directly fine streaks on Irutarenzu substrate disappears required, good filter accuracy can maintain the smoothness of the filter lens substrate can be manufactured.

Further, the present invention has a configuration in which the filter element 4 is sandwiched between at least two circular filter lens front substrate 2 and circular filter lens rear substrate 3, and the filter element 4 includes a light transmitting portion and a slightly transmitting portion, In addition, the part that does not transmit light at all is made of paper or cloth patterned with lines, dots, circles, squares, triangles, etc., resin sheets, glass, and films or resin nets. It consists of a hole-shaped part that transmits light and a plate-shaped part that does not transmit light at all, and the hole-shaped part that transmits light is made of stainless steel plate, aluminum plate, copper plate, slits, small holes, circles, squares or triangles. Newly designed to create various special effects as well as soft filters and cross-filters by selecting the filter material 4 can be selected as desired. It is possible to provide a special filter have.

The present invention has a configuration in which the filter element 4 is sandwiched between at least two circular filter lens front substrates 2 and a circular filter lens rear substrate 3, so that the filter element as in the conventional manufacturing process of this type of filter. 4 is bonded between the circular filter lens front side substrate 2 and the circular filter lens rear side substrate 3 without applying an adhesive to the entire surface, so that bubbles are not generated on the respective adhesive surfaces. It is possible, and the filter lens can be manufactured very simply and efficiently, so that a special filter can be provided at a low cost.

DESCRIPTION OF SYMBOLS 1 Optical axis of filter lens 2 Circular filter lens front side board 3 Circular filter lens rear side board 4 Filter element 5 Filter lens 6 Circumferential part 7, 7a, 7b Adhesive 8 Circular edge part 9 Cover seal 10 Front frame 11 Rotation Part washer 12 rear frame 13 female screw 14 filter lens fitting part 15a, 15b fitting groove 16 filter lens mounting frame 17 male screw 18 spacer

Claims (5)

A filter element is formed by sandwiching a filter element between two circular filter lens front substrates and a circular filter lens rear substrate arranged at least front and rear with respect to the optical axis of the filter lens. Adhering the circular filter lens front substrate and the circular filter rear substrate with an adhesive at the periphery of the sandwiched filter lens, and then covering and sealing the circular edge of the filter lens with a synthetic resin material A special filter for a digital camera, characterized in that a filter lens is formed by integrating the circular filter lens front substrate, the filter material, and the circular filter rear substrate. A filter element is formed by sandwiching a filter element between two circular filter lens front substrates and a circular filter lens rear substrate arranged at least front and rear with respect to the optical axis of the filter lens. The circular filter lens front substrate, the circular filter lens rear substrate and the circular filter lens rear substrate are bonded to each other through a spacer at the circumferential portion of the sandwiched filter lens, and then the circular filter lens front substrate, the spacer, and the circle. A filter lens in which the circular filter lens front substrate, the filter material, the spacer, and the circular filter lens rear substrate are integrated by covering and sealing the edge formed by the rear substrate of the filter filter lens with a synthetic resin material. Special filter for digital cameras, characterized by forming. The filter element is an arbitrary paper, cloth, or resin sheet in which a part that transmits light, a part that transmits light a little, and a part that does not transmit light at all are patterned with lines, dots, circles, squares, triangles, etc. 3. A special filter for a digital camera according to claim 1, wherein the filter is made of glass, glass, and a net made of film or resin. The filter element includes a hole-shaped portion that transmits light and a plate-shaped portion that does not transmit light at all, and the hole-shaped portion that transmits light has any slit or small hole such as a stainless steel plate, an aluminum plate, or a copper plate. 3. The special filter for a digital camera according to claim 1, wherein the filter is formed with a patterned shape such as a circle, a square, or a triangle. A filter element is formed by sandwiching a filter element between two circular filter lens front substrates and a circular filter lens rear substrate arranged at least front and rear with respect to the optical axis of the filter lens. Adhering the circular filter lens front substrate and the circular filter rear substrate with an adhesive at the periphery of the sandwiched filter lens, and then covering and sealing the circular edge of the filter lens with a synthetic resin material Or a filter lens by sandwiching a filter element between two circular filter lens front substrates and a circular filter lens rear substrate arranged at least in front of and behind the optical axis of the filter lens, and the filter The circular filter lens front substrate and the circular filter lens at the circumference of the filter lens sandwiching the element After the rear substrates are bonded to each other with an adhesive via a spacer, the circular filter lens front substrate, the spacer, and the circular edge formed by the circular filter lens rear substrate are covered and sealed with a synthetic resin material. A method for producing a special filter for a digital camera, characterized in that a filter lens is configured by integrating the circular filter lens front substrate, the filter material, the spacer, and the circular filter rear substrate.