WO2001065306A1 - Dispositif optique - Google Patents
Dispositif optique Download PDFInfo
- Publication number
- WO2001065306A1 WO2001065306A1 PCT/JP2001/001477 JP0101477W WO0165306A1 WO 2001065306 A1 WO2001065306 A1 WO 2001065306A1 JP 0101477 W JP0101477 W JP 0101477W WO 0165306 A1 WO0165306 A1 WO 0165306A1
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- WO
- WIPO (PCT)
- Prior art keywords
- pass filter
- filter
- optical device
- optical
- optical low
- Prior art date
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/006—Filter holders
-
- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
Definitions
- the present invention relates to an optical device used for an imaging device of a video camera or an electronic still camera.
- An optical device used in a general video camera has a solid-state imaging device such as a coupling optical system, an optical low-pass filter, a color separation filter, a CCD (Charge Coupled Device) and a MOS (Metal Oxide Semiconducter) on an optical axis from the subject side.
- a solid-state imaging device such as a coupling optical system, an optical low-pass filter, a color separation filter, a CCD (Charge Coupled Device) and a MOS (Metal Oxide Semiconducter) on an optical axis from the subject side.
- the optical low-pass filter in the configuration of the optical device filters an optical false signal detected by the imaging device, thereby preventing a video camera from deteriorating the image quality.
- an object having color information such as lattice fringes
- an imaging device such as a CCD
- An optical low-pass filter is used to block and attenuate spatial frequency components related to the pseudo signal.
- accommodating space for optical devices has been reduced along with miniaturization of video cameras and the like, and it has been required to effectively accommodate optical devices in limited accommodating spaces.
- Japanese Patent Laying-Open No. 59-11085 discloses a configuration in which a cover member is not provided at an opening of a CCD storage package and an optical aperture one-pass filter is directly attached.
- a square grid-like pixel having the same horizontal and vertical pixel pitch is used for the CCD for an electronic still camera used for video capture of a personal computer and a videophone.
- the shape of the optical low-pass filter used in such CCDs for electronic still cameras must be square in shape to match the shape of the CCD.
- An optical device for such an application generally has a structure in which a cover member is provided, and a step having a shape that fits with the cover member is formed in the opening of the package cage, and the step and the cover member are fitted together. It has become.
- solid-state imaging devices are susceptible to adverse effects when the color becomes unnatural due to the transmission of light in the infrared region.
- the package containing the solid-state imaging device is made of a material that does not transmit light.
- an infrared cut coat is applied to the force bar member.
- the step portion and the cover member with an ultraviolet curable resin adhesive, the provisional curing time is shortened, and an adverse effect due to heat is avoided.
- the infrared cut coat applied to the cover member has a problem of blocking ultraviolet rays. Purple ray curing used for bonding The resin adhesive could not be cured sufficiently, resulting in poor sealing of the cover member.
- an infrared cut coat is deposited on each cover member using a mask jig, and no infrared light coat is applied only to the coated part of the UV-curable resin adhesive. A configuration using a thermosetting resin adhesive instead of the adhesive was considered.
- the present invention solves the problems in the various optical devices described above.
- the weight and size of the optical device can be reduced, and when the optical low-pass filter is installed, it can be easily manufactured regardless of the vertical and horizontal directions.
- the filter function of the optical low-pass filter can be improved.
- a first object is to provide an optical device that does not lower the optical device.
- an optical device includes an image sensor and a package for accommodating the image sensor.
- the package has an opening having a square shape in a plan view. It is characterized by the fact that a main surface is provided with an optical aperture filter having a square shape.
- the optical G-pass filter provided in the opening having a square shape in plan view also has a square main surface, so that there is no need for vertical and horizontal positioning.
- the optical low-pass filter separates the incident light in a 45 ° direction and cuts the light to form a two-point separation pattern.
- a birefringent plate is used.
- the optical low-pass filter of this configuration is used for the soil 90. Regardless of whether the optical low-pass filter is installed in a rotated state or when it is installed upside down, the characteristics of the obtained optical low-pass filter are all the same because the position components of the pattern are the same. Therefore, there is no need to perform a process such as providing a notch in the direction of the optical axis to make a mark so that the vertical and horizontal directions and the front and back directions of the optical low-pass filter are not mistaken. Performance can be improved and costs can be reduced.
- a horizontally-separated birefringent plate cut so as to horizontally separate incident light, and a vertically split birefringent plate.
- Vertical separation compound cut to separate The refraction plate is overlapped with a 45 ° separation birefringent plate that is cut so as to separate the incident light in the 45 ° direction.
- the plates are configured to be of equal thickness.
- the configuration of the optical low-pass filter is such that two birefringent plates having mutually orthogonal separation directions are superposed on each other with a depolarizing plate interposed therebetween.
- the configuration is as follows.
- the two birefringent plates are horizontally separated birefringent plates that are cut so as to horizontally separate incident light into light, and light is vertically separated into incident light.
- the birefringent plates may be constituted by vertically separated birefringent plates cut in such a manner, and these birefringent plates may have the same thickness.
- the optical low-pass filter rotates two or more birefringent plates having separation directions perpendicular to each other by rotating at least one of these birefringent plates by 95 ° or ⁇ 135 °.
- the two birefringent plates having the separation directions orthogonal to each other are mutually superposed with the birefringent plates in the separation directions adjacent to each other, and have the same thickness.
- the optical low-pass filter is provided with a vertical separation birefringent plate cut so as to separate the incident light in the vertical direction and a cutting process so as to split the incident light in the horizontal direction.
- a 45 ° split birefringent plate that is cut so as to separate the incident light into 45 ° is interposed.
- another 45 ° separating birefringent plate having a separating direction orthogonal to the separating direction of the 45 ° separating birefringent plate is adjacent to the vertical separating birefringent plate or the horizontal separating birefringent plate in a state of being adjacent to each other. Superimposed.
- the optical low-pass filter comprises three 45 ° -separating birefringent plates cut so as to separate the incident light into 45 ° directions. It is configured to be superposed on each other with a depolarizing plate interposed between the separation birefringent plates.
- the optical low-pass filter having the above-described configuration includes a color correction filter and a color correction filter. It is preferable that an antireflection filter is formed.
- the color correction filter may be configured to include at least one of an infrared cut filter and an ultraviolet cut filter. Further, the color correction filter is made of at least one of a coating material, a glass material, and a resin material. Further, the antireflection filter may be made of a coating material.
- the optical low-pass filter is fixed to the opening of the package via an ultraviolet curing adhesive.
- An optical device wherein a positioning step is formed over the periphery of either the opening of the package or the optical low-pass filter, and the optical low-pass filter is formed through the step. Is characterized by being attached to the opening.
- An optical device is the optical device, wherein a step is provided around a periphery of the opening of the package, and the optical low-pass filter is fixed on the step via an ultraviolet curing adhesive.
- the color correction filter and / or the anti-reflection filter are formed on the upper surface of the optical low-pass finolter, and the color correction filter and / or the color correction filter located above the ultraviolet curing adhesive are provided.
- It is characterized by the formation of a Z or antireflection filter portion and an ultraviolet transmitting portion formed by removing a part of the optical low-pass filter adjacent to the color correction filter and / or the antireflection filter portion.
- the ultraviolet transmitting portion may be a cutout formed at an upper end of the optical low-pass filter or a rectangular groove formed near an upper end. .
- An optical device wherein the ultraviolet transmitting portion is formed on each of four end portions on the upper surface of the optical low-pass filter, and It is characterized by the fact that the shape of the opposite end side of the outside line transmitting portion is the same.
- An optical device includes an image sensor, an opening having a rectangular shape in a plan view, and a package for accommodating the image sensor.
- a light transmitting power member is fixed on the step portion through an ultraviolet curing adhesive, and a color correction filter and / or an anti-reflection filter are formed on an upper surface of the cover member. And a portion of the cover member adjacent to the color correction filter and / or the antireflection filter portion located above the ultraviolet curing adhesive and the color correction filter and / or the antireflection filter portion. It is characterized by the fact that an ultraviolet transmitting portion is formed by removing the ultraviolet rays.
- the ultraviolet transmitting portion may be a notch formed in the upper end of the cover member or a square groove formed in the vicinity of the upper end.
- the ultraviolet transmitting portion is formed at four end portions on the upper surface of the cap member, and the shape of only one end portion of the ultraviolet transmitting portion is: It is characterized by having a shape different from the shape of the ultraviolet transmitting portion on the other end side.
- the optical device wherein the ultraviolet transmitting portion is formed on each of four end portions of the upper surface of the cover member, and the opposite end portion of the shiba line transmitting portion. It is characterized by having the same shape.
- the ultraviolet light reaches the ultraviolet-curable adhesive without being hindered by the configuration of the ultraviolet transmitting portion. As a result, sufficient rigidity is achieved.
- FIG. 1 is an exploded perspective view showing a first embodiment of the present invention
- FIG. 2 is a schematic sectional view of the first embodiment
- FIG. 3 (a) shows the first embodiment.
- Optical port used Diagram showing the beam separation direction of the one-pass filter
- FIG. 4 (b) shows the separation pattern
- FIG. 4 (a) shows the optical low-pass filter of FIG. 3 rotated ⁇ 90 ° or turned over.
- FIG. 3B is a diagram showing the light beam separation direction
- FIG. 5 is a schematic cross-sectional view of a second embodiment of the present invention
- FIG. 6 (a) is a diagram showing a light beam separating direction of each birefringent plate of an optical low-pass filter used in the second embodiment.
- FIG. 7B shows the separation pattern by this
- FIG. 7A shows the light beam separation direction of each birefringent plate of the optical low-pass filter when the optical low-pass filter of FIG. 6 is rotated by ⁇ 90 °
- FIG. 6B is a diagram showing a separation pattern when the optical low-pass filter of FIG. 6 is rotated by ⁇ 90 °.
- FIG. 8 (a) shows the separation pattern of the optical low-pass filter used in the modification of the second embodiment
- FIG. 8 (b) rotates the separation pattern of FIG. 8 (a) by ⁇ 90 °. It is a figure showing a separation pattern in the case of having performed.
- FIG. 9 (a) shows a separation pattern of an optical low-pass filter used in another modification of the second embodiment
- FIG. 9 (b) shows the separation pattern of FIG. 9 (a) rotated by ⁇ 90 °. It is a figure showing a separation pattern in the case of having performed.
- FIG. 10 is a schematic sectional view of a third embodiment of the present invention
- FIG. 11 (a) is a light beam separating direction of each birefringent plate of an optical low-pass filter used in the third embodiment.
- FIG. 2 (b) is a diagram showing a separation pattern by this.
- FIG. 12 is a schematic cross-sectional view of a fourth embodiment of the present invention
- FIG. 13 (a) shows a light beam separating direction of each birefringent plate of an optical low-pass filter used in the fourth embodiment.
- FIG. 3B is a diagram showing a separation pattern by this.
- FIG. 14 (a) is a diagram showing a beam separation direction of each birefringent plate of the optical low-pass filter used in the fifth embodiment of the present invention
- FIG. 14 (b) is a diagram showing a separation pattern by this.
- FIG. 15 (a) is a diagram showing a light beam separating direction of each birefringent plate of an optical low-pass filter used in another example of the fifth embodiment of the present invention, and FIG. FIG.
- FIG. 16 is a schematic cross-sectional view of a sixth embodiment of the present invention
- FIG. FIG. 14B is a diagram showing a light beam separating direction of each birefringent plate of the optical aperture one-pass filter used in the sixth embodiment
- FIG. 14B is a diagram showing a separating pattern by this.
- FIG. 18 (a) is a diagram showing a separation pattern of an optical low-pass filter used in a modification of the sixth embodiment.
- FIG. 19 (a) is a diagram showing a separation pattern of an optical low-pass filter used in another modification of the sixth embodiment.
- FIG. 20 (a) is a diagram showing a light beam separation direction of each birefringent plate of the optical low-pass filter used in the seventh embodiment
- FIG. 20 (b) is a diagram showing a separation pattern by this.
- FIGS. 21 (a) to (d) are diagrams each showing an embodiment in which a color correction filter and an antireflection filter are provided in an optical low-pass filter.
- FIG. 22 is a diagram for explaining a method of installing an optical low-pass filter applied to the optical device of the present invention.
- FIGS. 23 to 28 are optical low-pass filters to which this installation method is applied.
- FIG. 3 is a diagram showing the configuration of FIG.
- FIG. 29 is a schematic sectional view of the eighth embodiment of the present invention.
- FIGS. 30 (a) to (d) are views for explaining a method of manufacturing the cover member shown in FIG. 29.
- FIG. 31 is a schematic cross-sectional view showing a modification of the eighth embodiment of the present invention.
- FIG. 32 is a schematic sectional view of a ninth embodiment of the present invention.
- FIG. 33 is a schematic sectional view of a tenth embodiment of the present invention.
- FIG. 34 is a plan view of a force par member applied to the eleventh embodiment of the present invention.
- FIG. 35 is a plan view of a force par member applied to the 12th embodiment of the present invention.
- FIG. 1 is an exploded perspective view showing a first embodiment of the present invention
- FIG. 2 is a schematic sectional view of the first embodiment
- FIG. 3 (a) shows the first embodiment.
- Optical port used Figure showing the beam separation direction of the one-pass filter
- Figure (b) shows the separation pattern
- Figure 4 (a) shows the optical low-pass filter of Figure 3 rotated ⁇ 90 ° or turned inside out.
- FIG. 3B is a view showing a light beam separation direction in a state in which the beam is split
- FIG. 3B is a view showing a light beam separation direction in a state in which the beam is split
- the optical device includes a CCD element 2, a package 15 having an opening 12 having a square shape in plan view, and an optical device having a square main surface attached so as to seal the opening 12. Consists of a low-pass filter 10.
- the package 15 is made of, for example, a light-impermeable material formed by resin molding.
- An accommodation space 14 and an opening 12 in a part of the package 15 are formed in a square shape in plan view corresponding to the main surface shape of the CCD element 2.
- the CCD element 2 is fixed to the bottom in the accommodation space 14 with an adhesive, and is electrically connected.
- a step 13 is formed in the opening 12, and the optical low-pass filter 10 is fitted into the step 13 with the adhesive 13, and the package 15 is fixed.
- the structure is hermetically sealed. Note that the relative distance between the CCD element 2 and the optical low-pass filter 10 is optimally designed based on the dimensions of the package 15.
- the optical low-pass filter 10 used in the present embodiment is made of a quartz crystal having a square main surface, and is cut into a single 45 ° birefringent light so as to separate incident light into 45 ° light. Consists of boards. As shown in FIG. 3, the optical low-pass filter 10 separates the incident unit light beam into two light beams in the 45 ° direction. Also, as shown in FIG. 4, even if the optical low-pass filter 10 shown in FIG. 3 is installed with the soil rotated by 90 °, or installed upside down, The light beam is separated into two light beams in the 45 ° direction by simply changing the pattern shown in Fig. 3 and the object relative to the vertical line VL, which is the center line.
- FIG. 5 is a schematic sectional view of a second embodiment of the present invention.
- FIG. 6 (a) is a diagram showing a beam separation direction of each birefringent plate of the optical low-pass filter used in the second embodiment
- FIG. 6 (b) is a diagram showing a separation pattern by this
- FIG. (A) is a diagram showing the beam separation direction of each birefringent plate of the optical low-pass filter in a state where the optical low-pass filter of FIG. 6 is rotated by ⁇ 90 °
- (b) is an optical low-pass filter of FIG.
- FIG. 9 is a diagram showing a separation pattern when is rotated ⁇ 90 °.
- the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
- the second embodiment is different from the first embodiment in the configuration of the optical low-pass filter 20.
- This optical low-pass filter 20 is a horizontal separation birefringent plate 201 that is cut to separate the incident light in the horizontal direction, and is cut to separate the light in the 45 ° direction.
- the three separated birefringent plates 202 and the vertically separated birefringent plates 203 cut so as to separate light in the vertical direction are laminated in this order from the incident surface side with an adhesive.
- Each of the birefringent plates 201, 202, and 203 has a main surface made of a quartz crystal having a square shape, and the main surface has the same outer dimensions.
- the horizontal split birefringent plate 201 and the vertical split birefringent plate 203 have the same thickness, and the thickness of the 45 ° split birefringent plate 202 is In the case of 0 1 or ⁇ 2 times the thickness of the vertical separation birefringent plate 203, a seven-point separation pattern composed of points P1 to P7 as shown in FIG. 6 is obtained. Note that broken lines in these drawings are auxiliary lines for convenience of explanation of the separation pattern, and do not appear in the separation pattern.
- the separation pattern shown in FIG. 6 (b) shows the vertices of two squares SI and S2 that share point P4 as one vertex, Pl, P2, P3, P4 and ⁇ P4 , P 5, P 6, and P 7.
- the square S 1 And the square S 2 are located at the point object with respect to the point P 4.
- Optical aperture one-pass filter 20 exhibiting such a separation pattern ⁇ 90. Regardless of whether it is mounted in a rotated state or turned upside down, as shown in Fig. 7 (b), the sixth line is positioned relative to the vertical center line VL, which is the horizontal center line. Only the pattern shown in Fig. (B) is replaced by the positional relationship of the object. In such a pattern, even if rotated by 90 ° or turned inside out, the position components of the pattern are the same, and the resulting optical low-pass is obtained.
- the filter characteristics are the same as those of the optical low-pass filter 20 shown in FIG.
- the horizontal split birefringent plate 201 and the vertical split birefringent plate 203 have the same thickness, and the thickness of the 45 ° split birefringent plate 202 is the horizontal split birefringent plate 201 or the vertical split birefringent plate 203. If the thickness is larger than "2 times the thickness, a separation pattern composed of eight points P1 to P8 as shown in FIG. 8 (a) or (b) is obtained. b) shows the separation pattern that appears when the optical aperture one-pass filter that forms the separation pattern shown in Fig. 8 (a) is rotated by 90 °. Each of the term positions of 2 appears at PI, P2, P3,? 4 and 5, P6, P7, and P8.
- this separation pattern Even if the optical low-pass filter 20 showing such a separation pattern is mounted while being rotated by ⁇ 90 °, As shown in Fig. 8 (b), the position component of the pattern is only replaced by the pattern shown in Fig. 8 (a) with respect to the vertical line VL which is the horizontal center line. Therefore, the obtained optical low-pass filter characteristics are the same as those of the optical low-pass filter 20 shown in FIG.
- the horizontal separating birefringent plate 201 and the vertical separating birefringent plate 203 have the same thickness, and the thickness of the 45 ° separating birefringent plate 202 is the horizontal separating birefringent plate 201 or the vertical separating birefringent plate. If the thickness is smaller than twice the thickness of 203, the separation pattern shown in FIG. 8 is different from the separation pattern shown in FIG. 8 in that the vertices P4 and P6 of the square S1 and the square S2 enter each other. This separation pattern is also located symmetrically with respect to the midpoint C of the line connecting P 4 and P 6. This separation pattern The separation pattern when the optical low-pass filter 20 is rotated ⁇ 90 °
- FIG. 9 (b) it is equivalent to FIG. 9 (a).
- the form of the separation pattern appearing at the apex position of the square can be changed by controlling the thickness ratio of the 45 ° separation birefringent plate 202. Further, the thickness ratio can be appropriately set according to the characteristics, design, and the like of a desired optical device.
- Figs. 7 (b) and 7 (b) are diagrams obtained by rotating the pattern of (a) ⁇ 90 °.
- Fig. 8 (b) and Fig. 9 (b) were explained, but these figures are obtained by turning over the patterns of Fig. 6 (b), Fig. 8 (a) and Fig. 9 (a) respectively. It can also be applied to In other words, even when the optical low-pass filter having the configuration in which the patterns shown in FIGS. 6 (b), 8 (a) and 9 (a) appear is inverted, the configuration of the separation pattern obtained as described above is The same filter characteristics are obtained.
- FIG. 10 is a schematic sectional view of the third embodiment of the present invention.
- FIG. 11 (a) is a diagram showing a light beam separation direction of each birefringent plate of the optical low-pass filter used in the third embodiment
- FIG. 11 (b) is a diagram showing a separation pattern by this.
- the same components as those in the above embodiment are denoted by the same reference numerals, and description thereof will be omitted.
- the third embodiment is different from the above embodiments in the configuration of the optical low-pass filter 30.
- the optical low-pass filter 30 is composed of a horizontal split birefringent plate 301 cut to separate the incident light in the horizontal direction, a quarter-wave plate 302 used as a depolarizing plate, and a vertical direction.
- Three vertically separated birefringent plates 303 which have been cut so as to separate light into light, are superposed in this order from the incident surface side with an adhesive.
- Each of these birefringent plates 301, 302, and 303 has a main surface made of a quartz crystal having a square shape, and the main surface has the same outer dimensions.
- the horizontal split birefringent plate 301 and the vertical split birefringent plate 303 have the same thickness.
- the optical low-pass filter 30 converts the incident unit light flux into the vertex position P of the square S3. Separate into 4 points of light flux: 1, 1, P12, P13, P14. Therefore, although not shown, even if the optical low-pass filter 30 is mounted by rotating it by ⁇ 90 ° or mounted upside down, the obtained separation pattern is the same, and in this case, the same filter characteristics are obtained. can get.
- FIG. 12 is a schematic sectional view of a fourth embodiment of the present invention.
- FIG. 13 (a) is a diagram showing a light beam separation direction of each birefringent plate of the optical low-pass filter used in the fourth embodiment
- FIG. 13 (b) is a diagram showing a separation pattern by this.
- the same components as those in the above embodiment are denoted by the same reference numerals, and description thereof will be omitted.
- the fourth embodiment is different from the above-described embodiment in the configuration of the optical low-pass filter 40.
- the optical low-pass filter 40 has a 45 ° split birefringent plate 401 cut so as to separate the incident light in a 45 ° direction, a quarter-wave plate 402 used as a depolarizing plate, and a 45 ° splitter.
- Three refraction plates 403 are superposed with an adhesive in this order from the incident surface side.
- Each of these birefringent plates 401, 402, and 403 has a main surface made of a quartz crystal having a square shape, and the main surfaces have the same outer dimensions.
- the 45 ° -separated birefringent plates 401 and 403 have the same thickness. As shown in FIG.
- this optical low-pass filter 40 converts the incident unit light beam into four light beams at the vertices P11, P12, P13, and P14 of the square S4.
- This separation pattern is the same as the separation pattern shown in Fig. 11 (b) in that it forms a square, but the position of the vertex of square S4 is the position obtained by rotating square S3 by ⁇ 90 °. It is in. Also in this embodiment, although not shown, even if the optical low-pass filter 40 is mounted by rotating it by 90 ° on the soil or mounted upside down, the obtained separation pattern is the same. The filter characteristics of-are obtained.
- FIG. 14 (a) is a diagram showing a light beam separating direction of each birefringent plate of the optical low-pass filter used in the fifth embodiment of the present invention.
- the fifth embodiment is different from the above embodiments in the configuration of the optical low-pass filter 50.
- the optical low-pass filter 50 includes a horizontal separation birefringent plate 501 cut and processed so as to separate incident light in a horizontal direction, and two 45 ° separation birefringent plates 502 whose light separation directions are orthogonal to each other. 503 are superimposed by an adhesive in this order.
- Each of the birefringent plates 501, 502, and 503 has a main surface made of a quartz crystal having a square shape, and the main surfaces have the same outer dimensions.
- the 45 ° separating birefringent plates 502 and 503 are formed to have the same thickness as each other, and the horizontal separating birefringent plate 501 is formed to be twice as thick as the 45 ° separating birefringent plate 502 (503).
- the optical low-pass filter 50 converts the incident unit luminous flux into four luminous fluxes at the apex positions P11, P12, P13, and P14 of the square S3. To separate. Therefore, although not shown, even if the optical low-pass filter 30 is mounted by rotating it by ⁇ 90 ° or mounted upside down, the obtained separation pattern is the same, and the same filter characteristics are obtained in this case as well. can get.
- FIG. 15 (a) is a diagram showing a light beam separating direction of each birefringent plate of the optical low-pass filter used in the embodiment
- FIG. 15 (b) is a diagram showing a separating pattern by this.
- the optical low-pass filter 60 has a 45 ° separating birefringent plate 601, a horizontal separating birefringent plate 602, and a vertical separating birefringent plate 603, which are cut so as to separate the incident light in a 45 ° direction by an adhesive in this order. It is superimposed.
- Each of these birefringent plates 601, 602, and 603 has a main surface made of a quartz crystal having a square shape, and the main surfaces have the same outer dimensions. Further, the horizontal separation birefringent plate 602 and the vertical separation birefringent plate 603 have the same thickness.
- This optical low-pass filter 60 is shown in Fig.
- the incident unit light beam is split into four light beams at the vertices P11, PI2, PI3, and P14 of the square S4.
- This separation pattern is common to the separation pattern shown in FIG. 14 (b) in that it forms a square, but the vertex position of the square S4 is a position obtained by rotating the square S3 by ⁇ 90 °. Also in this embodiment, although not shown, even if this optical low-pass filter 60 is mounted by rotating it by ⁇ 90 ° or mounted upside down, the obtained separation pattern is the same, and in this case also the same. Filter characteristics of
- FIG. 16 is a schematic sectional view of a sixth embodiment of the present invention.
- FIG. 17 (a) is a diagram showing a light beam separation direction of each birefringent plate of the optical low-pass filter used in the sixth embodiment
- FIG. 17 (b) is a diagram showing a separation pattern by this.
- the same components as those in the above embodiment are denoted by the same reference numerals, and description thereof will be omitted.
- the sixth embodiment is different from the above embodiments in the configuration of the optical low-pass filter 70.
- the optical low-pass filter 70 is composed of a horizontal separation birefringent plate 702 cut so as to horizontally separate incident light and a vertical separation birefringent plate 704 cut so as to vertically separate incident light. And a 45 ° separating birefringent plate 703 cut so as to separate the incident light into 45 ° light, and the 45 ° separating birefringent plate 703 is placed on the horizontal separating birefringent plate 702. 45 ° separation birefringent plates 701 having a separation direction orthogonal to the above separation direction are superimposed on each other.
- the horizontal split birefringent plate 702 and the vertical split birefringent plate 704 have the same thickness, and the 45 ° split birefringent plates 71 and 703 have the same thickness.
- Each of the birefringent plates 701, 702, 703, and 704 has a main surface made of a quartz crystal having a square shape, and has the same outer dimensions as the main surface.
- the thickness of the 45 ° birefringent plate 701 and the 45 ° birefringent plate 703 is equal to “2 times the thickness of the horizontal birefringent plate 702 or the vertical birefringent plate 704,
- the optical low-pass filter 70 as shown in FIG.
- the points P 21, P 2 located at the vertices of the four squares S 20, S 21, S 22, S 23 sharing the four points P 22, P 23, P 25, P 28 2, P23, P24, P25, P26, P27, P28, P29, P30, P31, and P32 are separated into two 1'-point light beams. Also in this embodiment, although not shown, even if the optical aperture one-pass filter 70 is mounted by rotating by 90 ° or mounted upside down, the obtained separation pattern is the same. In this case, the same filter characteristics can be obtained.
- the incident unit light beam is split into 16 light beams located at the vertices of four squares S30, S31, S32, and S33. Also in this case, although not shown, the obtained separation pattern is the same even if the optical low-pass filter 70 that obtains this separation pattern is rotated by ⁇ 90 ° or mounted upside down. In this case, the same filter characteristics can be obtained.
- the incident unit light beam is separated into 12 light beams located at the vertices of four squares S40, S41, S42, and S43.
- the optical low-pass filter 70 for obtaining this separation pattern is ⁇ 90. The separation pattern obtained is the same regardless of whether the filter is rotated or mounted upside down. In this case, the same filter characteristics can be obtained.
- FIG. 20 (a) is a diagram showing a light beam separation direction of each birefringent plate of the optical low-pass filter used in the seventh embodiment
- FIG. 20 (b) is a diagram showing a separation pattern by this.
- the seventh embodiment differs from the above-described embodiment in the configuration of the optical low-pass filter 80.
- Optical low-pass filter 80 Three 45 ° -separated birefringent plates 801, 803, and 805, which are cut so as to separate light into light, and a quarter-wave plate 802 as a depolarizing plate between these 45-degree separated birefringent plates 801, 803, and 805. , 804 are superimposed on each other with each intervening.
- Each of these birefringent plates 801, 802, 803, 804, and 805 has a main surface made of a quartz crystal having a square shape, and the main surface has the same outer dimensions. As shown in FIG.
- the optical low-pass filter 80 converts the incident unit light flux into a point P 30 located at the apex of two squares S5 and S6 sharing the apexes P30 and P33. , P31, P32, P33, P34, P35. Also in this embodiment, although not shown, the obtained separation pattern is the same even if the optical low-pass filter 80 that obtains this separation pattern is rotated by ⁇ 90 ° or mounted upside down, Also in this case, the same filter characteristics can be obtained.
- a 1/4 wavelength plate is used as the configuration of the depolarizing plate.
- the present invention is not limited to this.
- a 1Z 2 wavelength plate or an optical rotation plate may be used. .
- the optical low-pass filters 10, 20, 30, 40, 50, 60, 70, 80 in the above embodiment may be provided with a color capturing filter and a no-reflection or anti-reflection filter.
- Color correction filters increase the resolution of optical devices by selectively removing or weakening light at specific wavelengths.
- Examples of the color correction filter include an infrared power filter and an ultraviolet power filter.
- Iroto positive filter as a coating material, structure and applying a like dye or paint on the incident surface of the optical low-pass filter, there is formed by laminating the vapor deposited film such as T io 2, S io 2.
- Z r 0 2 and N b 2 0 5 film and may be in place of the T i 0 2 film, also may be a Mg F 2 in place of the S i 0 2 film may be any appropriate deposition material.
- the color correction filter can also be configured by closely attaching a member made of a resin material or the like in which a glass material, a dye, a paint, or the like is dispersed in an epoxy resin or the like.
- an anti-reflection filter there are M g F 2, A J2 2 0 3, Z r 0 2, T i 0 2, S i 0 2 alone, such as consisting of or these combination of coating materials.
- FIG. 21 shows an example in which such a color correction filter and an antireflection filter are provided in an optical low-pass filter.
- FIG. 21 (a) has a configuration in which an infrared cut filter 21 is formed on the incident surface of the optical low-pass filter 10.
- FIG. 1 (1) shows a configuration in which an ultraviolet cut filter 23 is formed on the entrance surface of the optical aperture one-pass filter 10.
- an anti-reflection filter or the like can be added to provide a light transmitting function as required.
- FIG. 1C there is a configuration in which an antireflection filter 22 is provided on the incident surface of the optical low-pass filter 10 and an infrared cut filter 21 is provided on the other main surface. .
- an infrared cut filter 21 and an antireflection filter 22 are stacked on the incident surface of the optical low-pass filter 10 as shown in FIG.
- the color correction filter and the anti-reflection filter are provided in the optical low-pass filter is not limited to these examples, and the color correction filter may include at least one of a coating material, a glass material, and a resin material. It is composed of appropriate combinations.
- FIG. 22 is a diagram for explaining a method of installing an optical low-pass filter applied to the optical device of the present invention.
- FIGS. 23 to 28 are optical low-pass filters to which this installation method is applied.
- FIG. 3 is a diagram showing the configuration of FIG.
- the optical low-pass filter 10 is fixed to the opening 12 of the package 15 via an ultraviolet curing adhesive.
- a positioning step 13 is formed over the periphery of the opening 12 of the package 15, and an ultraviolet curing adhesive 24 is applied on the step 13. Then, the optical low-pass filter 10 is fixed.
- the configuration shown in FIG. 23 is based on one main surface of the optical low-pass filter 10.
- a step 101 for positioning over the peripheral edge is formed, and the step 101 is fitted into the opening 12.
- the step portion 101 and the opening portion 12 are bonded to each other via an ultraviolet curing adhesive 24.
- the ultraviolet curing adhesive 24 is sufficiently cured by light incident from the side of the optical low-pass filter 10.
- FIGS. 24 to 28. From the viewpoint of more effectively curing the ultraviolet curing adhesive 24 in the configuration of FIG. 22 described above, more preferred configurations of the optical low-pass filter are shown in FIGS. 24 to 28. .
- an infrared cut filter 21 is formed on the incident surface.
- the infrared cut filter 21 has a problem of hindering the transmission of ultraviolet rays, and this is avoided by employing an optical low-pass filter described below.
- one of the infrared low-pass filter 21 located above the ultraviolet curing adhesive 24 and the optical low-pass filter 10 adjacent to the infrared power filter 21 is used.
- a notch 31 is formed by notching the part. With this structure, ultraviolet rays enter through the notch 31 and reach the ultraviolet-curable adhesive 24 more effectively, so that the ultraviolet-curable adhesive 24 is sufficiently cured.
- the structure for effectively transmitting the ultraviolet rays to the ultraviolet-curing adhesive 24 includes, as shown in FIG. 25, the infrared filter 21 at the upper end of the optical low-pass filter 10 and the infrared filter 21.
- the ultraviolet light transmitting portion may be formed by a chamfered portion 32 in which the optical port one-pass filter 10 is chamfered to the infrared power filter 21.
- the configuration of the chamfered portion 32 also has the effect of preventing chipping or cracking from occurring at the corners of the optical low-pass filter 10.
- one of the infrared low-pass filter 21 located above the ultraviolet-curable adhesive 24 and the optical low-pass filter 10 adjacent to the infrared low-pass filter 21 is used.
- a rectangular groove 33 is formed, and this rectangular groove 33 is used as an ultraviolet transmitting portion.
- the structure of the There is a structure in which a notch 31 is formed at one end of the upper surface of the filter 10 and a chamfered portion 32 is formed at the other three ends.
- the rectangular groove 33 can be easily recognized as a specific portion, and can have a function as a discrimination between the front and back or a mark indicating the separation direction of the birefringent plate.
- the ultraviolet light effectively reaches the ultraviolet-curing adhesive 24 through the ultraviolet-transmitting portion, so that the optical low-pass filter 10 has the opening 12. It is firmly adhered to and sealed.
- the opening of the package is sealed with an optical low-pass filter.
- an optical device having a configuration in which a light-transmitting cover member is used instead of the optical-port one-pass filter.
- FIG. 29 is a schematic sectional view of the eighth embodiment of the present invention.
- the image pickup device and the package structure are the same as those of the above-described embodiment, and thus the description is omitted.
- the cover member 90 is fitted into the opening 12 of the package 15, and is fixed on the step portion 13 of the package 15 with the ultraviolet curing adhesive 24, The opening 12 of the package 15 is sealed with the cover member 90.
- the cover member 90 has a main surface made of a square glass, and an infrared cut coat 2 in which T i 0 2 film and S i 0 2 film are alternately laminated from 20 to 50 layers on the upper surface. 1 1 is formed.
- a notch 41 is formed on the periphery of the end portion of the member 90, and the notch 41 is formed by the infrared cut coat 2 11 located above the ultraviolet curing adhesive 24 and the infrared cut coat 21.
- the structure is such that a part of the cover member 90 adjacent to the cut coat 211 is removed.
- FIG. 30 is a view for explaining the manufacturing method.
- an infrared cut coat 211 is applied to the entire upper surface of a flat wafer 900.
- the ingot body 9100 of the wafer 900 is divided into small pieces of desired dimensions in the direction of the arrow as shown in FIG.
- a blade 99 having a two-stage cross section is used as shown in FIG.
- FIG. 31 showing a schematic sectional view thereof.
- the cover member 90 shown in FIG. 30 is arranged with its notch 41 facing the step 13 of the package 15, and the notch 41 is cut with an ultraviolet curing adhesive 24.
- opening 12 of package 15 is sealed with cover member 90.
- the material of the cover member 90 used in the present embodiment is not limited to glass, but may be a quartz plate, lithium niobate, lithium tantalate, or the like.
- FIG. 32 is a schematic sectional view of a ninth embodiment of the present invention.
- the optical device of the present embodiment includes a CCD element 2, a package 15 o for accommodating the CCD element 2, a cover member 91 for enclosing the accommodation space 14 1 for the CCD element 2, and a package 150. And an optical low-pass filter 10 for sealing the opening 120 of the optical filter.
- Package 150 is the same as Package 15 above It consists of a light-impermeable structure formed by resin molding.
- the internal structure of this package 150 has a two-step structure with steps 130 and 131 around the inner wall surface.
- An accommodation space 144 corresponding to the planar shape of the bar member 91 and an accommodation space 144 corresponding to the planar shape of the optical low-pass filter 10 are respectively formed.
- the cover member 91 mounted in the present embodiment is made of the same material as that of the eighth embodiment, and has the same infrared cut coat formed thereon. The difference is that it is composed of 0.
- the chamfered portion 420 can also have the effect of preventing chipping or cracking from occurring at the corners of the force par member 91. Further, the configuration described in the above embodiment can be appropriately adopted for the optical low-pass filter 10.
- Stepped portion 1 3 0 and the cover member 9 1 package is by connexion secured to UV curable adhesive 2 4.
- the ultraviolet light is sufficiently transmitted through the UV-curable adhesive 24 by the configuration of the chamfered portion 420, so that the housing space 141 is sealed by the cover member 91.
- the optical low-pass filter is fixed to the step 131 with an adhesive, but it is also possible to adopt the above-described configuration of the optical low-pass filter and seal it by fixing with an ultraviolet curing adhesive. .
- FIG. 33 is a schematic sectional view of a tenth embodiment of the present invention.
- the optical device includes a CCD element 2, a package 150 accommodating the CCD element 2, a cover member 92 enclosing the accommodation space 141 of the CCD element 2, and a package 150.
- a lens 25 made of convex glass for sealing the opening 120 of the lens is provided.
- the cover member 92 is made of the same material as that of the eighth embodiment, and is formed with a similar infrared cut coat, except that the ultraviolet ray transmitting portion is constituted by a square groove 4 30. different.
- This square groove 4 3 Numeral 0 is formed slightly in the middle of the end of the cover member 92, and it is easier to recognize the rectangular groove 430 as a specific portion than in the eighth and ninth embodiments. Since it is easy to distinguish between them, it can also function as a mark.
- the cover member 92 is fixed to the step portion 130 via the ultraviolet-curing adhesive 24 with the rectangular groove 4330 facing upward. At this time, due to the configuration of the rectangular grooves 4330, ultraviolet rays are sufficiently transmitted to the ultraviolet curing adhesive 24, and sufficient curing is performed. Also, the lens 25 is fixed to the step 13 1 via an adhesive.
- FIG. 34 is a plan view of a cover member applied to the eleventh embodiment of the present invention.
- the cover member 93 of the present embodiment has a rectangular groove 4300 at one end side of the upper surface of the cover member 93 and a chamfered portion 4 at the other three end sides as a structure of the ultraviolet ray transmitting portion. 20 is formed.
- the ultraviolet light transmitting portion since the ultraviolet light is sufficiently transmitted to the ultraviolet curable adhesive, sufficient curing is performed. Accordingly, the cover member 93 is accurately fixed to the step portion, and the opening is hermetically sealed.
- the rectangular groove 430 can be easily recognized as a specific portion, and it is easy to distinguish between the front and back sides, so that it can have a function as a mark.
- FIG. 35 is a plan view of a force par member applied to the 12th embodiment of the present invention.
- the configuration of the embodiment shown in FIG. 32 or FIG. 33 is different only in the configuration of the cover member.
- the cover member 94 of the present embodiment has, as a structure of an ultraviolet transmitting portion, a rectangular groove 4300 formed at an opposite end of the upper surface of the cover member 94, and a chamfered portion at the other end. 4 2 0 Are formed respectively.
- the ultraviolet light transmitting portion since the ultraviolet light is sufficiently transmitted to the ultraviolet curable adhesive, sufficient curing is performed. Therefore, the cover member 94 is accurately fixed to the step portion, and the opening is hermetically sealed.
- the rectangular groove 430 can be easily recognized as a specific portion, and it is easy to discriminate between the front and back sides, so that the cover member 94 can have a function as a mark.
- a CCD element is described as an image pickup element mounted in a package.
- the present invention is not limited to this, and another image pickup element, for example, an element such as MOS may be used.
- the optical device of the present invention can obtain practical filter characteristics, and can be reduced in size and weight. Further, the production efficiency in the production process is high, and the cost can be suppressed.
- various configurations can be dealt with, and the application can be made general-purpose.
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Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/959,347 US7123412B2 (en) | 2000-02-29 | 2001-02-28 | Optical device |
JP2001563947A JP3829717B2 (ja) | 2000-02-29 | 2001-02-28 | 光学装置 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000053380 | 2000-02-29 | ||
JP2000-53380 | 2000-02-29 | ||
JP2000-370887 | 2000-12-06 | ||
JP2000370887 | 2000-12-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001065306A1 true WO2001065306A1 (fr) | 2001-09-07 |
Family
ID=26586358
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2001/001477 WO2001065306A1 (fr) | 2000-02-29 | 2001-02-28 | Dispositif optique |
Country Status (4)
Country | Link |
---|---|
US (1) | US7123412B2 (ja) |
JP (1) | JP3829717B2 (ja) |
CN (1) | CN1207607C (ja) |
WO (1) | WO2001065306A1 (ja) |
Cited By (8)
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JP2004040287A (ja) * | 2002-07-01 | 2004-02-05 | Rohm Co Ltd | イメージセンサモジュール |
JP2009267396A (ja) * | 2008-03-31 | 2009-11-12 | Asahi Glass Co Ltd | 固体撮像素子パッケージ用窓ガラス |
KR100927765B1 (ko) * | 2002-05-10 | 2009-11-20 | 소니 가부시끼 가이샤 | 조광 장치 및 촬상 장치 |
JP2013152378A (ja) * | 2012-01-26 | 2013-08-08 | Nikon Corp | 光学ローパスフィルタ、撮像装置および投影装置 |
JP2015213306A (ja) * | 2014-04-17 | 2015-11-26 | キヤノン株式会社 | 撮像装置 |
DE102015106041A1 (de) * | 2015-04-20 | 2016-10-20 | Rodenstock Gmbh | Kalibrierelement für eine Polarisationsachsenmessvorrichtung und Polarisationsachsenmessvorrichtung mit einem Kalibrierelement |
JP2019035946A (ja) * | 2017-08-10 | 2019-03-07 | キヤノン株式会社 | 光学ローパスフィルタおよび撮像装置 |
JP2021165781A (ja) * | 2020-04-06 | 2021-10-14 | エスゼット ディージェイアイ テクノロジー カンパニー リミテッドSz Dji Technology Co., Ltd | 光学ローパスフィルタ、撮像装置、撮像システム及び移動体 |
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US20010007475A1 (en) * | 2000-01-06 | 2001-07-12 | Asahi Kogaku Kogyo Kabushiki Kaisha | Image pickup device and its mounting structure for an optical low-pass filter |
JP3829717B2 (ja) * | 2000-02-29 | 2006-10-04 | 株式会社大真空 | 光学装置 |
JP4148139B2 (ja) * | 2001-11-21 | 2008-09-10 | 株式会社大真空 | 光学フィルタ、この光学フィルタの製造方法およびこの光学フィルタを用いた光学装置ならびにこの光学フィルタの収納構造 |
JP2005286888A (ja) * | 2004-03-30 | 2005-10-13 | Fuji Photo Film Co Ltd | 固体撮像装置 |
CN100516957C (zh) * | 2005-08-19 | 2009-07-22 | 鸿富锦精密工业(深圳)有限公司 | 数码相机镜头模块 |
CN101346817B (zh) * | 2005-12-26 | 2010-09-01 | 夏普株式会社 | 固体摄像元件模块的制造方法 |
JP2007181044A (ja) * | 2005-12-28 | 2007-07-12 | Mitsumi Electric Co Ltd | カメラモジュール |
JP4506678B2 (ja) * | 2006-01-16 | 2010-07-21 | ソニー株式会社 | プリズム光学系および撮像装置 |
WO2008093830A1 (ja) * | 2007-02-02 | 2008-08-07 | Panasonic Corporation | 撮像装置、その製造方法および携帯端末装置 |
JP5455706B2 (ja) * | 2010-02-25 | 2014-03-26 | キヤノン株式会社 | 固体撮像装置、撮像ユニット及び撮像装置 |
US8486214B2 (en) * | 2011-09-27 | 2013-07-16 | Source Photonics, Inc. | Ramped, variable power UV adhesive cure process for improved alignment |
CN104076475A (zh) * | 2013-03-29 | 2014-10-01 | 鸿富锦精密工业(深圳)有限公司 | 摄像头模块及其制造方法 |
JP5880605B2 (ja) * | 2014-03-19 | 2016-03-09 | 株式会社大真空 | 光学ローパスフィルタ及び光学ローパスフィルタを備える撮像装置 |
JP6789696B2 (ja) * | 2016-06-30 | 2020-11-25 | キヤノン株式会社 | 光学ローパスフィルタおよびそれを有する撮像装置、撮像ユニット |
KR102319454B1 (ko) * | 2017-03-20 | 2021-10-28 | 엘지이노텍 주식회사 | 액체 렌즈 |
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KR100927765B1 (ko) * | 2002-05-10 | 2009-11-20 | 소니 가부시끼 가이샤 | 조광 장치 및 촬상 장치 |
JP2004040287A (ja) * | 2002-07-01 | 2004-02-05 | Rohm Co Ltd | イメージセンサモジュール |
JP2009267396A (ja) * | 2008-03-31 | 2009-11-12 | Asahi Glass Co Ltd | 固体撮像素子パッケージ用窓ガラス |
JP2013152378A (ja) * | 2012-01-26 | 2013-08-08 | Nikon Corp | 光学ローパスフィルタ、撮像装置および投影装置 |
JP2015213306A (ja) * | 2014-04-17 | 2015-11-26 | キヤノン株式会社 | 撮像装置 |
DE102015106041A1 (de) * | 2015-04-20 | 2016-10-20 | Rodenstock Gmbh | Kalibrierelement für eine Polarisationsachsenmessvorrichtung und Polarisationsachsenmessvorrichtung mit einem Kalibrierelement |
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JP2021165781A (ja) * | 2020-04-06 | 2021-10-14 | エスゼット ディージェイアイ テクノロジー カンパニー リミテッドSz Dji Technology Co., Ltd | 光学ローパスフィルタ、撮像装置、撮像システム及び移動体 |
Also Published As
Publication number | Publication date |
---|---|
US20020158985A1 (en) | 2002-10-31 |
US7123412B2 (en) | 2006-10-17 |
JP3829717B2 (ja) | 2006-10-04 |
CN1365453A (zh) | 2002-08-21 |
CN1207607C (zh) | 2005-06-22 |
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