JP5036023B2 - Imaging device and eyepiece - Google Patents

Description

  The present invention relates to a photographing apparatus in which a camera and a telescope are assembled. The present invention also relates to an eyepiece lens attached to the telescope of such an imaging apparatus.

  In recent years, a technique for enlarging and photographing a distant subject using a photographing apparatus in which a compact digital still camera and a telescope are assembled is becoming widespread. At this time, the camera and the telescope are assembled so that their optical axes coincide with each other via the attachment. Further, the telescope can change the magnification by attaching and detaching the eyepiece.

  To shoot with such an imaging device, attach an eyepiece that can set the desired magnification, adjust the focus of the telescope, connect the attachment to the telescope, connect the camera to the attachment, and bring the subject into the field of view of the camera Capture and take steps to adjust the focus again. You can use the zoom function of the camera to change the magnification, but since this function is approximately 3 times, generally remove the telescope and camera from the attachment, replace the eyepiece, and repeat the above procedure. become.

  In this photographing apparatus, if the position of the exit pupil of the telescope and the position of the entrance pupil of the camera do not coincide with each other, there is a possibility that a satisfactory photograph cannot be taken such as vignetting. Here, the length of the eyepiece lens from the body-mounted surface of the telescope to the exit pupil generally differs depending on the lens. For this reason, an attachment configured to be slidable in the optical axis direction with the camera temporarily fixed to the attachment has been devised. According to this attachment, the position of the entrance pupil of the camera can be adjusted while sliding the camera so as to match the exit pupil of the telescope.

  However, adjusting the pupil position while moving the camera each time the eyepiece is replaced is a troublesome and time-consuming operation for the user. In particular, in such a photographing apparatus, an assembling operation using an attachment is essential, and it is required to shorten the preparation time until photographing so as not to miss a photo opportunity.

  In view of such a problem, the present invention provides an imaging device that can easily adjust the positions of the exit pupil of the telescope and the entrance pupil of the camera in the imaging device in which the camera and the telescope are assembled. An object of the present invention is to provide an eyepiece that can easily adjust the position of the pupil and the entrance pupil of the camera.

In order to achieve the above object, an imaging apparatus according to the present invention includes a telescope having a telescope optical system capable of changing a magnification by attaching and detaching an eyepiece, and imaging optics in which an entrance pupil is located at a predetermined position with a stop. A camera having a system, and an attachment that connects the telescope and the camera so that the optical axis of the telescope optical system and the optical axis of the imaging optical system coincide with each other, and the telescope via the attachment When the camera is connected, the distance from the predetermined reference position to the exit pupil of the telescope optical system is substantially equal to the distance from the reference position to the entrance pupil of the camera regardless of the attached eyepiece. A pupil position matching mechanism, and the eyepiece is configured to accommodate a lens inside a cylindrical tube, and the attachment includes a fitting portion that fits into the tube, The pupil position matching mechanism is provided on the outer peripheral surface of the cylindrical body and the engagement fixing member. The engagement position is set according to the distance between the exit pupil of the eyepiece to which the eyepiece is attached and the mounting surface with the attachment barrel, and the engagement fixing member is engaged with the groove. Thus, when the attachment is attached, the exit pupil position of the telescope optical system and the entrance pupil position of the camera coincide with each other.
In addition, the imaging apparatus according to the present invention includes a telescope having a telescope optical system capable of changing a magnification by attaching and detaching an eyepiece, and an imaging optical system having an aperture and an entrance pupil positioned at a predetermined position. A camera and an attachment that connects the telescope and the camera to match the optical axis of the telescope optical system and the optical axis of the imaging optical system, and the telescope and the camera are connected via the attachment. Pupil position matching that when connected, causes the distance from a predetermined reference position to the exit pupil of the telescope optical system to be approximately equal to the distance from the reference position to the entrance pupil of the camera, regardless of the attached eyepiece The eyepiece is configured to accommodate a lens inside a cylindrical tube, and the telescope includes a housing body provided with the objective lens, and the housing body A lens attachment portion is formed for accommodating a part of the cylindrical body and detachably attaching the eyepiece lens to the housing body, and the attachment includes a fitting portion that fits on an outer surface of the lens attachment portion; An engagement fixing member provided in the fitting portion, and the pupil position matching mechanism is provided on the outer peripheral surface of the engagement fixing member and the lens mounting portion and is engaged with the engagement fixing member. A slit-shaped groove that can be combined, and the formation position of the groove is set according to the distance between the exit pupil of the eyepiece to which the groove is mounted and the mounting surface with the mounting barrel, and the engagement fixing member is engaged with the groove. Thus, when the attachment is attached, the exit pupil position of the telescope optical system and the entrance pupil position of the camera are configured to coincide with each other.

Further, the eyepiece according to the present invention has a telescope having a telescope optical system whose magnification can be changed by attaching and detaching the eyepiece, and an imaging optical system having a stop and an entrance pupil located at a predetermined position. In the eyepiece provided in an imaging device including a camera and an attachment that connects the telescope and the camera to match the optical axis of the telescope optical system and the optical axis of the imaging optical system, The lens is configured to accommodate the lens inside a cylindrical tube, and the attachment includes a fitting portion fitted into the tube and an engagement fixing member provided in the fitting portion. And the engagement portion is engaged with the telescope when the engagement portion is engaged with the telescope. Engagement groove for mating is formed The attachment position is set by setting the engagement groove formation position to a different position according to the distance between the exit pupil of the eyepiece lens to which the engagement groove is attached and the surface of the attachment barrel, and engaging the engagement fixing member with the engagement groove. When configured, the exit pupil of the telescope optical system and the entrance pupil of the imaging optical system are substantially overlapped .
Further, the eyepiece according to the present invention has a telescope having a telescope optical system whose magnification can be changed by attaching and detaching the eyepiece, and an imaging optical system having a stop and an entrance pupil located at a predetermined position. In the eyepiece provided in an imaging device including a camera and an attachment that connects the telescope and the camera to match the optical axis of the telescope optical system and the optical axis of the imaging optical system, The lens is configured to accommodate the lens inside a cylindrical tube, and the attachment includes a fitting portion that is fitted to an outer peripheral side of the cylinder, and the fitting portion is attached to the cylinder. Is fitted to the telescope, and the cylinder is provided with a marker indicating a mounting position when the attachment is attached by fitting with the fitting portion. Formation of When the attachment is attached using the marker, the exit pupil of the telescope optical system and the imaging are set at different positions according to the distance between the exit pupil of the eyepiece to which the device is attached and the surface with the attachment barrel The entrance pupil of the optical system is configured to substantially overlap.

  According to such a configuration of the photographing apparatus according to the present invention, the pupil position matching mechanism can always match the exit pupil of the telescope optical system and the entrance pupil of the camera regardless of the difference in the eyepiece. Therefore, when changing the magnification of the telescope by replacing the eyepiece, it is not necessary to adjust the pupil position, and it is possible to easily assemble a photographing apparatus that can take a photograph without vignetting. Similarly, according to the configuration of the eyepiece according to the present invention, when the attachment is attached to the eyepiece and connected to the telescope, the exit pupil of the telescope optical system and the entrance pupil of the camera can be easily matched.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. First, the schematic configuration of the photographing apparatus according to the present invention will be described with reference to FIG. The photographing apparatus 1 includes a telescope 2, a camera 3, and an attachment 4 provided between the telescope 2 and the camera 3 and connecting the telescope 2 and the camera 3.

  The telescope 2 is based on a Kepler-type telescope, and includes a positive lens system objective lens 11, a focusing lens 12, an erecting prism 13, and a positive lens system eyepiece 14 in order from the object side on the optical axis L1. It has a telescope optical system 10 arranged. In the telescope 2, an eyepiece 14 is detachably attached to a substantially cylindrical casing 20 that houses an objective lens 11, a focusing lens 12, and an erecting prism 13 therein. The magnification can be changed by exchanging a plurality of eyepieces 14 having different focal lengths. A bracket 21 extending downward from the outer surface is integrally formed on the housing 20, and a tripod is detachably attached via the bracket 21.

  In the telescope optical system 10, an observation object image 15 by the objective lens is formed at a predetermined position between the erecting prism 13 and the eyepiece lens 14. Further, the exit pupil 16 is located at a predetermined position behind the eyepiece 14. The focusing lens 12 is movable in the direction of the optical axis L1 in the housing 20 in accordance with a rotation operation of a dial (not shown) provided on the outer surface of the housing 20. The focus is adjusted by the movement of the focusing lens 12.

  The eyepiece 14 is configured by accommodating a lens inside a cylindrical eyepiece 25, and a part of the eyepiece 14 is accommodated in an eyepiece mounting portion 22 formed in a substantially cylindrical shape at the end of the housing 20. In a state, it is detachably attached by a predetermined mounting mechanism. At this time, a part of the eyepiece tube 25 is abutted against the body-mounted surface 23 formed on the periphery of the eyepiece lens mounting portion 22, and the eyepiece lens 25 is positioned with respect to the housing 20.

  The camera 3 is a compact digital still camera, and is positioned on the imaging plane of the imaging optical system 35 and an imaging optical system 35 configured by arranging a zoom lens group and a stop on the optical axis L2. An image pickup device (not shown) that performs photoelectric conversion based on an image formed by the image forming optical system 35 and an image processing device (not shown) that processes an electric signal from the image pickup device are housed in the housing 30.

  A housing 30 of the camera 3 is provided with a zoom lens housing cylinder 31 that houses a zoom lens group and can extend and contract in the axial direction. The zoom lens housing cylinder 31 is configured by combining a plurality of cylindrical members in a nested manner. Further, a tripod screw hole 32 is formed on the lower surface of the housing 30 of the camera 3 so that the tripod can be detachably attached.

The coupling optical system 35 is configured such that the movable lens group of the zoom lens can move in the optical axis direction within the zoom lens housing cylinder 31, and the imaging optical system 35 according to the movement of the movable lens group of the zoom lens. The magnification of can be changed. The diaphragm is generally arranged inside the zoom lens. The entrance pupil 36 is located in front of the zoom lens group at a position separated from the tripod screw hole 32 by L ₄₆ . The maximum angle omega ₃₅ of the imaging optical system 35 is approximately 30 ° about.

  The attachment 4 includes a main body portion, a telescope engagement fixing member for fixing the telescope 2, and a camera engagement fixation member for fixing the camera 2. When the telescope 2 is installed in the main body, the main body and the telescope 2 are fixed by the telescope engaging fixing member, and the camera 3 is installed in the main body and the main body and the camera 3 are fixed by the camera engaging fixing member. The optical axis L1 of the telescope optical system 10 and the optical axis L2 of the coupling optical system 35 coincide with each other.

  The imaging apparatus 1 also has a pupil position that matches the exit pupil 16 of the telescope optical system 10 and the entrance pupil 36 of the imaging optical system 35 when the telescope 2, the camera 3, and the attachment 4 are assembled. It has a matching mechanism.

  Hereinafter, a first configuration example of the photographing apparatus schematically configured as described above will be described with reference to FIG. The telescope 2 includes, as the eyepiece 14, for example, a low magnification setting lens 14 </ b> A for setting a low magnification of 20 × and a high magnification setting lens 14 </ b> C for setting a high magnification of 60 ×.

As shown in FIG. 1A, when the low-magnification setting lens 14A is attached, the exit pupil 16 of the telescope optical system 10 is positioned away from the body surface 23 by L _A. As shown in FIG. 1B, when the high-magnification setting lens 14C is attached, the exit pupil 16 of the telescope optical system 10 is located at a distance L _C from the body surface 23, and the low-magnification setting lens 14A is attached. Is shifted toward the object side by δ _AC (L _C = L _A −δ _AC ). The position of the exit pupil 16 when both lenses 14A and 14C are attached can be obtained in advance if the lens design is determined.

The eyepieces 25A and 25C of both lenses 14A and 14C have the same outer size. A slit-like groove 26 extending in the circumferential direction is formed on the outer peripheral surface of the eyepiece tube 25 of the eyepiece 14. The groove 26A of the eyepiece tube 25A of the low-magnification setting lens 14A is formed so as to be positioned on the eyepiece side by d _{A in the} axial direction from the surface that abuts against the body surface 23 (hereinafter referred to as the mounting surface). The groove 26C of the eyepiece 25 of the high magnification setting lens 14C is formed on the eyepiece side by d _A −δ _{AC in the} axial direction from the mounting surface. That is, the groove 26C is formed at a position shifted to the mounting surface side by the same distance as the shift amount δ _AC of the exit pupil 16 toward the object side.

By the way, as shown in FIG. 2, in such a telescope 2, the field angle 2ω ′ corresponding to the field stop 15 ′ (image 15) placed on the focal plane of the objective lens 11 can be observed. The telescope 2 observes the image 15 with the eyepiece 14 enlarged to an angle of view 2ω. Therefore, if the magnification of the telescope 2 is M, 2ω = 2ω ′ × M. Here, if the apparent field of view of the low magnification setting lens 14A is ω _A and the apparent field of view of the high magnification setting lens 14C is ω _C , then ω _A / ω ′ = 20 and ω _C / ω ′ = 60. On the other hand, the apparent fields of view ω _A and ω _C of each eyepiece are set so that the absolute value of the difference between them is smaller than 5 ° (that is, | ω _C −ω _A | ≦ 5).

  The main body 40 of the attachment 4 has a shape in which cylinders having different inner diameters are integrally connected on a concentric shaft. A telescope fitting portion 41 is formed at one end opening of the main body 40, a camera fitting portion 42 is formed at the other end opening, and an optical path portion 43 is formed between both fitting portions 41, 42. Further, the camera body 40 is provided with a camera fixing bracket 44 extending in the axial direction of the camera body 40 from the lower surface of the camera fitting part 42.

  The telescope fitting portion 41 has an inner diameter slightly larger than the outer diameter of the eyepiece tube 25, and can fit the inner peripheral surface to the outer side of the eyepiece tube 25. The camera fitting portion 42 has an inner diameter that is slightly larger than the outer diameter of the cylindrical member located on the outermost side of the zoom lens housing cylinder 31, and the inner peripheral surface can be fitted to the outer side of the cylindrical member. By this fitting, the upper surface of the camera fixing bracket 44 comes into contact with the lower surface of the housing 30 of the camera 3.

Further, a telescope fixing bolt (telescope engaging fixing member) 45 passes through the telescope fitting portion 41 from the outer peripheral surface side toward the inner peripheral surface side and is attached at a predetermined position. A camera fixing bolt (camera engagement fixing member) 46 passes through the camera fixing bracket 44 from the lower surface side to the upper surface side and is attached to a predetermined position. The telescope fixing bolt 45 may be provided at any position with respect to the circumferential direction. Both bolts 45 and 46 are separated by L _{40 in} the axial direction.

  In this photographing apparatus 1, the telescope fixing bolt 45 is fastened by fitting the telescope fitting portion 41 and the eyepiece tube 25 and tightening the telescope fixing bolt 45 with the inner end of the telescope fixing bolt 45 in contact with the groove 26. 45 engages with the groove 26, and the telescope 2 is fixed to the attachment 4. As described above, the telescope coupling means 41 that couples the attachment 4 and the telescope 1 is configured by the telescope fitting portion 41, the telescope fixing bolt 45, and the groove 26 of the eyepiece 25. Further, the camera 3 is fixed to the attachment 4 by fitting the camera fitting portion 42 to the zoom accommodating cylinder 31 and screwing the camera fixing bolt 46 into the tripod screw hole 32. Thus, the camera fixing bolt 46 and the tripod screw hole 32 constitute camera connecting means for connecting the attachment 4 and the camera 3. The inner diameters of the fitting portions 41 and 42 and the outer diameters of the eyepiece tube 25 and the zoom housing tube 31 are set to predetermined appropriate values. The axis alignment of the main body 40 and the zoom accommodating cylinder 31 is performed with high accuracy, and the optical axis L1 of the telescope optical system 10 and the optical axis L2 of the imaging optical system 35 coincide. By sliding the attachment 4 with respect to the telescope 2 with the telescope fixing bolt 45 in contact with the outer peripheral surface of the eyepiece tube 25, the engagement between the telescope fixing bolt 45 and the groove 26 is transmitted to the hand, A person who assembles the photographing apparatus 1 can easily know a place where the telescope fixing bolt 45 should be tightened.

As described above, the telescope 2 and the attachment 4 are positioned in the optical axis direction by the engagement of the telescope fixing bolt 45 with the groove 26. Here, the attachment position of the telescope fixing bolt 45 and the formation position of the groove 26 are defined as a first reference position A. With this positioning, when the low-magnification setting lens 14A is attached as shown in FIG. 1A, the distance from the body surface 23 to the first predetermined position A is d _A , and the telescope optics from the first reference position A the distance to the exit pupil 16 of the system 10 is (L _a -d _a). The camera 3 and the attachment 4 are positioned in the optical axis direction by engaging the camera fixing bolt 46 with the tripod screw hole 32. Here, the attachment position of the camera fixing bolt 46 and the formation position of the tripod screw hole 32 are defined as a second reference position B. With this positioning, when the high magnification setting lens 14C is attached as shown in FIG. 1B, the distance from the second reference position B to the entrance pupil 36 of the imaging optical system 35 is L ₄₆ , and the first reference position The distance from A to the entrance pupil 36 of the imaging optical system 35 is (L ₄₀ -L ₄₆ ).

In this photographing apparatus 1, L _A and L ₄₆ are obtained in advance based on the specifications of the telescope optical system 10 and the imaging optical system 35 (camera 3), and then the telescope optical system from the first reference position A is obtained. D _A so that the distance from the first reference position A to the entrance pupil 36 of the imaging optical system 35 (L ₄₀ -L ₄₆ ) is equal to the distance from the ten exit pupils 16 (L _A -d _A ). And L ₄₀ are set.

As shown in FIG. 1B, when the high-magnification setting lens 14C is attached, the position where the groove 26C is formed by the deviation δ _AC of the distance from the body surface 23 to the exit pupil 16 is the attachment surface (body surface). 23), the distance from the first reference position A to the exit pupil 16 of the telescope optical system 10 is L _A −d _A as in the case where the low magnification setting lens 14A is attached. On the other hand, the same camera 3 is used, and the distance from the first reference position A to the entrance pupil 36 of the imaging optical system 35 is L ₄₀ -L ₄₆ . Therefore, even when the high-magnification setting lens 14 </ b> C is attached, the position of the exit pupil 16 of the telescope optical system 10 and the position of the entrance pupil 36 of the imaging optical system 35 can be matched.

The pupil position matching mechanism is configured by the groove 26 of the eyepiece tube 25 in which d _A is set in this way and the attachment 4 in which L ₄₀ is set in this way. Even if the exit pupil 16 of the system 10 is formed at a different position depending on the eyepiece 14, the position of the exit pupil 16 of the telescope optical system 10 and the imaging optical system 35 regardless of the attached eyepiece 14. The position of the entrance pupil 36 can be matched.

Next, the allowable range of the position of the exit pupil 16 will be described with reference to FIG. It is assumed that the effective diameter of the objective lens 11 is set to 60 mm. At this time, the light beam diameter l _A emitted from the eyepiece lens 14 and entering the camera 3 is 3 mm when the low magnification setting lens 14A is attached, and the light beam diameter l _C when the high magnification setting lens 14C is attached is 1 mm. FIG. 3 shows the luminous fluxes having the maximum angles of view ω _A and ω _C emitted from the low magnification setting lens 14A and the high magnification setting lens 14C, respectively. The maximum angles of view ω _A and ω _C are almost equal to the angle of view ω ₃₅ (= 30 °) of the camera 3. The exit pupil 16 is at the center position where the light beams intersect. The length D _A of the optical axis direction at this time beam diameter l _A is expressed by the following equation. D _A = 3 mm / sin 30 ° = 6 mm

Similarly, the length D _C in the optical axis direction of the light beam diameter l _C of the high magnification setting lens 14C is D _C = 2 mm. The allowable range of the exit pupil 16 is preferably set to a range that does not exceed the length D in the optical axis direction of the light beam diameter when the low magnification setting lens 14A having the largest light beam diameter is attached. Therefore, in the present configuration example, it is desirable that the allowable range of the exit pupil 16 is within 4 mm (= D _A −D _C ). When the eyepiece 14 is provided with a medium magnification setting lens capable of setting the magnification to 30 times, the light beam diameter is 2 mm, and the length of the light beam diameter in the optical axis direction is 4 mm. Therefore, the allowable range of the exit pupil 16 is preferably within 2 mm. In practice, it is common to provide a lens with such a medium magnification setting, and it is preferable to set such an allowable range. Within this allowable range, even if there is a deviation in the distance from the barrel surface to the exit pupil in each lens, it can be put to practical use as an imaging device.

Even if the positions of the entrance pupil 16 of the telescope optical system 10 and the exit pupil 36 of the imaging optical system 35 are matched, the maximum angles of view ω _A and ω _C of the eyepiece 14 of the telescope optical system 10 are the imaging optical system. When the angle of view is smaller than the maximum angle of view ω _{35 of 35} , as shown in FIG. 4, the image 17 of the field stop 15 ′ appears in the photographed photograph, and the outer portion of the photograph may become dark. Accordingly, both lenses 14A and 14C are set so that the maximum field angles ω _A and ω _C are larger than the maximum field angle ω ₃₅ of the imaging optical system 35. Due to such setting, vignetting does not occur in the photographed photo.

  As described above, according to the photographing apparatus 1 and the eyepiece 14 of this configuration example, the attachment 4 is fitted to the eyepiece 25 and the telescope fixing bolt 45 is engaged to be fixed to the telescope 2. A groove 26 for engaging with the telescope fixing bolt 45 is formed on the outer peripheral surface of the eyepiece tube 25 so as to extend in the circumferential direction. The grooves 26 are formed at different positions according to the positional deviation of the exit pupil 16. With such a structure, the installation position of the telescope fixing bolt 45 and the formation position of the groove 26 at the same position in the assembled state are set as the first reference position A, and the exit pupil 16 of the telescope optical system 10 from the first reference position A. The positions up to take a constant value regardless of the eyepiece 14 attached. Thereby, when the user of the photographing apparatus 1 performs the work of attaching and detaching the eyepiece 14 in order to change the magnification during photographing, the work of matching the positions of both pupils 16 and 36 can be omitted and photographing can be performed. It is possible to shorten the preparation time up to.

In addition, you may provide the medium magnification setting lens which can set the magnification of about 30 times. At this time, the distance L _B from the body surface 23 to the exit pupil 16 when the medium magnification setting lens is attached is the distance L _B from the body surface 23 to the exit pupil 16 when the low magnification setting lens 14A is attached. _When shifting to the object side by δ _{AB with} respect to _A , a slit-like groove is provided on the outer peripheral surface of the eyepiece that accommodates the medium magnification setting lens at a position separated by d _A −δ _AB from the mounting surface. Thus, a pupil position matching mechanism can be configured. Similarly, when the distance L _C is shifted to the eyepiece side by δ _{AB with} respect to the distance L _A , it is separated from the mounting surface by d _A + δ _{AB on} the outer peripheral surface of the eyepiece tube that accommodates the middle magnification setting lens. A pupil position matching mechanism can be configured by providing a slit-like groove at a certain position. Moreover, when the apparent field of view of the medium-magnification setting lens and omega _B, as well is set to ω _B ≧ ω _35, low magnification setting lens, the absolute value of the difference between the apparent field of view of the medium-magnification setting lenses and high magnification setting lens Each is preferably set to be within 5 ° (| ω _A −ω _B |, | ω _B −ω _C |, | ω _C −ω _A | ≦ 5 °). That is, it is preferable that the difference between the maximum apparent field and the minimum apparent field among selectable eyepieces is set within 5 °.

  Next, the imaging device 5 of the second configuration example will be described with reference to FIG. In addition, about the same member, the same code | symbol is attached | subjected and duplication description is abbreviate | omitted.

In the telescope 6, a slit-like groove 64 extending in the circumferential direction is formed on the outer peripheral surface of the lens mounting portion 62 at a position away from the body-mounted surface 63 by a predetermined distance d _A. Further, as the detachable and replaceable eyepieces, a low-magnification setting lens 14A and a high-magnification setting lens 14C for setting the same magnification as in the first configuration example are provided. However, the eyepieces 14A and 14C of this configuration example are optically designed so that the distances L _A and L _C from the body-mounted surface 63 to the exit pupil 16 are equal regardless of the lens to be attached. The eyepieces 65A and 65C are not provided with a groove as in the first configuration example.

  The main body portion 70 of the attachment 7 includes a cylindrical telescope fitting portion 71 having an inner diameter set slightly larger than the outer diameter of the lens mounting portion 62, a camera fitting portion 72 similar to the first configuration example, A cylindrical optical path portion 73 formed between the fitting portions 71 and 72 is integrated, and the respective portions 71 to 73 are positioned on the same axis. Further, the same camera fixing bracket 74 as that in the first configuration example is provided. Further, the telescope fitting portion 71 is provided with a telescope fixing bolt 75, and the camera fixing bracket 74 is provided with a camera fixing bolt 76.

The telescope 6 is attached by fitting the telescope fixing bolt 75 to the outer peripheral surface of the lens mounting portion 62 and engaging the inner end portion of the telescope fixing bolt 75 with the groove 64 formed on the outer peripheral surface of the lens mounting portion 62. 7 is engaged. As described above, the telescope fitting unit 71, the telescope fixing bolt 75, and the groove 64 of the lens mounting unit 62 constitute a telescope connecting unit that connects the attachment 7 and the telescope 6. Here, the attachment position of the telescope fixing bolt 75 and the formation position of the groove 64 are defined as a first reference position A. Further, the camera 3 is fixed to the attachment 7 in the same manner as in the first configuration example. Thus, the camera fixing bolt 46 and the tripod screw hole 32 constitute camera connecting means for connecting the attachment 7 and the camera 3. Here, the attachment position of the camera fixing bolt 76 and the formation position of the tripod screw hole 32 are defined as a second reference position B. Both bolts 75 and 76 are separated by L _{70 in} the axial direction.

Thereby, as shown in FIG. 5A, when the low-magnification setting lens 14A is attached, the distance from the first reference position A to the exit pupil 16 of the telescope optical system 10 becomes L _A + d _A. Further, the distance from the first reference position A to the entrance pupil 36 of the imaging optical system 35 is L ₇₀ -L ₇₆ . In this imaging device 5, these two distances (L _A + d _A), are set (L ₇₀ -L ₇₆₎ so that equal, L ₇₀ and d _A. In this configuration example, the pupil position matching mechanism is configured by the groove 64 of the lens mounting portion 62 in which d _A is set in this way and the attachment 7 in which L ₇₀ is set in this way.

As shown in FIG. 5B, when the high-magnification setting lens 14C is attached, the distance from the body surface 63 to the exit pupil 16 is equal to that when the low-magnification setting lens 14A is attached. The distance from the position of the exit pupil 16 of the telescope optical system 10 to (L _A + d _A ). Therefore, the distance from the first reference position A to the exit pupil 16 of the telescope optical system 10 is equal to the distance to the entrance pupil 36 of the imaging optical system 35.

  Thus, the distance from the body surface 63 to the exit pupil 16 is set to be constant in each of the eyepieces 14A and 14C, and the telescope fixing bolt 75 is formed in the groove 64 formed on the outer peripheral surface of the lens mounting portion 62. By engaging, the telescope fixing bolt 75 of the attachment 7 is fixed to the same location on the housing 60 side of the telescope 6 regardless of which eyepiece is attached, so that the first reference position A of the attachment 7 is fixed. The position to the exit pupil 16 can be made the same distance, and the position of the exit pupil 16 of the telescope optical system 10 and the position of the entrance pupil 36 of the imaging optical system 35 can be matched.

  Next, the imaging device 8 of the third configuration example will be described with reference to FIG. The same members as those in the above configuration example are denoted by the same reference numerals, and redundant description is omitted. The photographing apparatus 8 uses the same telescope 7 and camera 3, as in the second configuration example, and a low magnification setting lens 14A and a high magnification setting lens 14C.

  The main body 90 of the attachment 9 includes a telescope fitting portion 91 similar to the second configuration example, and a camera stay portion 92 that extends in a flat plate shape from the lower end of the telescope fitting portion 91 to the rear, and the telescope fitting portion The rear side of 91 is open. For this reason, the eyepiece 14 is positioned above the camera stay portion 92 when attached to the housing 60. The telescope fitting portion 91 is provided with a telescope fixing bolt 95 as in the second configuration example.

  The camera stay unit 92 includes a base 93 that is integrated with the telescope fitting unit 91 and extends in a flat plate shape, and a fixed portion 94 that is also formed in a flat plate shape, and is connected via a hinge mechanism 97. 94 is swingable with respect to the base 93. The fixing portion 94 is provided with a camera fixing bolt 96 from the lower surface to the upper surface, and the camera fixing bolt 96 is screwed into the tripod screw hole 32 of the camera 3 placed on the upper surface of the fixing portion 94. The camera 3 is fixed to the attachment 9.

  Thus, in the same manner as in the second configuration example, the position of the exit pupil 16 of the telescope optical system 10 and the position of the entrance pupil 36 of the imaging optical system 35 are matched regardless of the attached eyepieces 64A to 64C. Thus, the same effect as in the second configuration example can be obtained. Further, the attachment 9 is engaged with the housing 60, and the eyepiece 14 is opened above the camera stay portion 92. Further, the camera 3 is retracted from the optical axis L 1 of the telescope optical system 10 by swinging the fixed portion 94 by the action of the hinge mechanism 97. For this reason, the eyepiece 14 can be replaced while the telescope 6 and the camera 3 are fixed to the attachment 9, and the time required for changing the magnification during photographing can be greatly shortened.

  In addition, by providing a slit extending in the optical axis direction in the fixing portion 94 and inserting a bolt into the slit, the camera 3 can be slid and moved in the extending direction of the camera 3 in a temporarily fixed state. Thereby, even when the position of the entrance pupil 36 of the imaging optical system 35 is changed when the camera 3 is replaced, the camera can be appropriately slid to absorb the pupil position shift due to the change. Further, when the magnification is changed by the zoom function of the camera 3 and the position of the entrance pupil 36 is shifted, it can be easily handled in the same manner.

  So far, the embodiments of the photographing apparatus and the eyepiece according to the present invention have been described. For example, the attachment 4 of the first configuration example and the eyepieces 64A to 64C of the second configuration example are provided, and the grooves formed in the eyepieces of the respective eyepieces are the same from the eyepiece side end surface as in the second configuration example. The photographing apparatus may be configured by forming it at a position. Moreover, it includes the attachments 7 and 9 of the second configuration example or the third configuration example and the eyepieces 14A to 14C of the first configuration example, and the difference in distance from the body surface to the exit pupil is the same as in the first configuration example. Accordingly, the photographing device may be configured by forming three grooves in the lens mounting portion 62. In any form, the same effect as the above configuration example can be obtained.

  Further, in the first to third configuration examples, a slit-like groove is formed on the outer peripheral surface of the eyepiece or the lens mounting portion according to the position where the exit pupil 16 is formed, thereby positioning the telescope and the attachment in the axial direction. Although it is made to perform, it is not necessarily restricted to such a structure. Further, the reference position is not limited to the mounting position of the telescope fixing bolt. For example, in each configuration example, an end face of one end opening of the main body of the attachment may be used as the reference position.

  At this time, for example, the eyepiece may be configured to attach a marker to the eyepiece instead of the slit-shaped groove. For example, such a marker can be attached to a predetermined position on the outer peripheral surface of the eyepiece tube in the circumferential direction. By fixing the telescope fixing bolt so that the end face of the one end opening of the telescope fitting portion is aligned with this marker, the attachment can be attached to the eyepiece within the allowable range. Further, the eyepiece may be replaced with such a marker, and may be formed with a flange formed extending in the circumferential direction from the outer peripheral surface of the eyepiece. Thereby, the end face of the opening of the telescope fitting portion is once abutted, and the attachment is axially positioned with respect to the eyepiece lens. With these configurations, the attachment is positioned with respect to the eyepiece based on the end face of the one end opening.

  In addition, the camera connecting means is configured such that the camera fixing bolt is screwed into the tripod screw hole, but the camera fixing screw is provided in the camera fitting portion and is tightened so that the camera fixing screw is pressed against the outer peripheral surface of the zoom lens housing cylinder. It is good also as a form. Even in this case, if the distance between the two bolts is set appropriately by obtaining the distance from the mounting position of the camera fixing bolt to the entrance pupil of the imaging optical system in advance, the exit pupil of the telescope is similarly set. The position of the entrance pupil of the camera can be matched.

FIG. 2 is a schematic configuration diagram of a photographing apparatus according to the present invention in a first configuration example, where (a) is a configuration diagram when a low magnification setting lens is attached, and (b) is a configuration diagram when a high magnification setting lens is attached. Show. It is explanatory drawing of the apparent visual field of a telescope optical system. It is explanatory drawing of the tolerance | permissible_range of an eyepoint. It is a figure which shows a photograph in case the apparent visual field of a telescope is smaller than the imaging | photography field angle of a camera. FIG. 6 is a schematic configuration diagram of a photographing apparatus according to the present invention in a second configuration example, where (a) is a configuration diagram when a low magnification setting lens is attached, and (b) is a configuration diagram when a high magnification setting lens is attached. Show. It is a schematic block diagram of the imaging device concerning the present invention in the 3rd example of composition.

Explanation of symbols

A, B Reference position 1, 5, 8
2,6 Telescope 3 Camera 4, 7, 9 Attachment 10 Telescope optical system 14 Eyepiece 16 Exit pupil 20, 60 Case 23, 63 Body surface 25, 65 Eyepiece 26, 64 Groove 35 Imaging optical system 36 Entrance pupil
45, 75, 95 Telescope fixing bolt 46, 76, 96 Camera fixing bolt 97 Hinge mechanism

Claims (10)

A telescope having a telescope optical system capable of changing the magnification by attaching and detaching the eyepiece; and
A camera having an imaging optical system having an aperture and an entrance pupil located at a predetermined position;
The telescope and the camera are connected to each other to form an optical axis of the telescope optical system and an attachment that matches the optical axis of the imaging optical system,
When the telescope and the camera are connected via the attachment, the distance from a predetermined reference position to the exit pupil of the telescope optical system is determined from the reference position to the camera regardless of the attached eyepiece. Has a pupil position matching mechanism that makes the distance to the entrance pupil almost equal,
The eyepiece is configured by accommodating a lens inside a cylindrical tube,
The attachment includes a fitting portion that fits into the cylindrical body, and an engagement fixing member provided in the fitting portion,
The pupil position matching mechanism includes the engagement fixing member and a slit-like groove provided on the outer peripheral surface of the cylindrical body and engageable with the engagement fixing member, and the formation position of the groove is attached. It is set according to the distance between the exit pupil of the eyepiece and the mounting surface, and when the attachment is attached by engaging the engagement fixing member in the groove, the exit pupil position of the telescope optical system An imaging apparatus, wherein the entrance pupil positions of the cameras are matched . A telescope having a telescope optical system capable of changing the magnification by attaching and detaching the eyepiece; and
A camera having an imaging optical system having an aperture and an entrance pupil located at a predetermined position;
The telescope and the camera are connected to each other to form an optical axis of the telescope optical system and an attachment that matches the optical axis of the imaging optical system,
When the telescope and the camera are connected via the attachment, the distance from a predetermined reference position to the exit pupil of the telescope optical system is determined from the reference position to the camera regardless of the attached eyepiece. It has a pupil position matching mechanism that makes it almost equal to the distance to the entrance pupil ,
The eyepiece is configured by accommodating a lens inside a cylindrical tube,
The telescope has a housing body provided with the objective lens, and a lens mounting portion for accommodating a part of the cylindrical body in the housing body and removably attaching the eyepiece to the housing body Formed,
The attachment includes a fitting portion that fits to an outer surface of the lens attachment portion, and an engagement fixing member provided in the fitting portion,
The pupil position matching mechanism includes the engagement fixing member and a slit-like groove that is provided on an outer peripheral surface of the lens mounting portion and can be engaged with the engagement fixing member. The position of the exit pupil of the telescope optical system is set in accordance with the distance between the exit pupil of the eyepiece and the mounting surface with the attachment barrel, and the attachment is attached by engaging the engagement fixing member in the groove. And an entrance pupil position of the camera . Imaging apparatus according to the mounting position and the formation position of the grooves of the engagement fixing member to claim 1 or 2, characterized in that the reference position.   The photographing apparatus according to claim 1, wherein the attachment includes a camera retraction mechanism that retreats out of an optical path of the telescope optical system in a state where the camera is fixed.   The imaging apparatus according to claim 1, wherein the attachment includes a camera moving mechanism that moves the camera in an optical axis direction. When Δω ′ is the difference between the maximum and minimum apparent visual fields in the plurality of eyepieces to be attached and detached,
Δω ≦ 5 °
The imaging device according to claim 1, wherein the following condition is satisfied. When the apparent field of view of the eyepiece is 2ω and the maximum shooting angle of view of the camera is 2ω ′,
2ω '≦ 2ω
The imaging apparatus according to claim 1, wherein the following condition is satisfied. When the distance from the reference position to the exit pupil of the telescope optical system is L, and the maximum and minimum difference of L in the eyepiece to be attached is ΔL,
ΔL ≦ 2mm
The imaging device according to claim 1, wherein the following condition is satisfied. Connects the telescope and the camera with a telescope having a telescope optical system whose magnification can be changed by attaching and detaching the eyepiece, an imaging optical system having an aperture and an entrance pupil located at a predetermined position. Then, in the eyepiece lens provided in the photographing apparatus configured by an attachment that matches the optical axis of the telescope optical system and the optical axis of the imaging optical system,
The eyepiece is configured to accommodate a lens inside a cylindrical tube,
The attachment has a fitting portion fitted to the cylindrical body and an engagement fixing member provided in the fitting portion, and the fitting portion is fitted to the cylindrical body and connected to the telescope. Configured to be possible,
An engagement groove for engaging the engagement fixing member when being fitted to the fitting portion is formed in the cylindrical body,
Set a different position depending on the distance between the exit pupil of the eyepiece and the mounting surface with the attachment lens, which is to be attached with the formation position of the engagement groove,
An eyepiece in which the exit pupil of the telescope optical system and the entrance pupil of the imaging optical system substantially overlap when the attachment is attached by engaging the engagement fixing member with the engagement groove. lens. Connects the telescope and the camera with a telescope having a telescope optical system whose magnification can be changed by attaching and detaching the eyepiece, an imaging optical system having an aperture and an entrance pupil located at a predetermined position. Then, in the eyepiece lens provided in the photographing apparatus configured by an attachment that matches the optical axis of the telescope optical system and the optical axis of the imaging optical system,
The eyepiece is configured to accommodate a lens inside a cylindrical tube,
The attachment has a fitting portion that is fitted to the outer peripheral side of the cylindrical body, the fitting portion is fitted to the cylindrical body, and is configured to be connectable to the telescope.
A marker indicating an attachment position when the attachment is attached by fitting with the fitting portion is attached to the cylindrical body,
Set a different position according to the distance between the exit pupil of the eyepiece that attaches the formation position of the marker and the mounting surface,
An eyepiece in which the exit pupil of the telescope optical system and the entrance pupil of the imaging optical system substantially overlap when the attachment is attached using the marker.

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