JP2002228919A - Method and device for adjusting positions of light emitting element and light receiving element for auto- focusing unit, and camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a camera and to reduce its cost by accurately adjusting the position of an auto-focusing unit. SOLUTION: Light is emitted while a light emitting element holding frame 17 to which the light emitting element 16 is attached is held by a chuck 49, and auto-focusing light emitted to a chart plate 54 is picked up by a CCD camera 55. The position of the light emitting element 16 is adjusted in accordance with the image pickup result, and the frame 17 is fixed in a fixed lens barrel 15 with a UV curing adhesive after completing the adjustment. In the case of the light receiving element, the light receiving element is held in the vicinity of an attaching position similarly, and receives the auto-focusing light emitted from the light emitting element 16 and reflected by a reflector, and then is fixed by adjusting the position of the light receiving element in accordance with its light receiving state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for adjusting the positions of a light projecting element and a light receiving element of a distance measuring unit of a camera, and a camera.

[0002]

2. Description of the Related Art Conventionally, in an active distance measuring unit used for a camera or the like, light from a light emitting element is irradiated on a subject, light reflected from the subject is received by a light receiving element, and the light is reflected by the incident position of the incident light. The subject distance is detected. In such an active distance measuring unit, it is necessary to irradiate the position of the target mark of the finder with the light from the light projecting element in order to perform the accurate distance measuring. Also,
The light reflected by the subject needs to be incident on a predetermined position of the light receiving element. Therefore, the position adjustment of the finder, the light projecting element, and the light receiving element is performed by various methods.

As a method of adjusting the position of the active type distance measuring unit, a light emitting block provided with a light emitting element and a light receiving block provided with a light receiving element are disclosed in Japanese Utility Model Laid-Open No. 5214/1987. By rotating the eccentric shaft which engages with the light emitting element, or by rotating the adjusting screw in contact with the light emitting element, the light emitting element and the light receiving element are moved to adjust the position.

Japanese Patent Laid-Open Publication No. Hei 8-304014 discloses that a light projecting element and a light receiving element are integrated with a finder.
A method is disclosed in which the amounts of displacement of a light projecting element and a light receiving element with respect to a finder are obtained and position adjustment is performed.

[0005]

Problems to be Solved by the Invention
In the invention described in Japanese Patent Application Publication No. 14, the space required for the adjusting mechanism such as the eccentric shaft occupies a part of the volume inside the camera, which is a factor that hinders downsizing of the camera.

Further, in the invention described in Japanese Patent Application Laid-Open No. Hei 8-304014, since it is necessary to integrate the finder with the light projecting element and the light receiving element, the configuration of the components becomes complicated, which causes an increase in cost. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a method and an apparatus for adjusting the position of a distance measuring unit, which can contribute to downsizing of a camera and which can reduce the cost while having high accuracy, and a camera. The purpose is to do.

[0008]

In order to solve the above-mentioned problems, a method for adjusting the position of a light projecting element and a light receiving element of a distance measuring unit according to the present invention uses an adjusting position at a position where a target mark of a finder becomes a through image. An index is arranged, and the position of the light emitting element is moved to be attached to the base member so that the emission image of the light emitting element matches the adjustment position index.

Further, the position of the light receiving element is moved in accordance with the adjustment light emitted from a predetermined position, and the light receiving element is attached to the base member.

Further, in a state where the finder is combined with the light projecting element and the light receiving element, the electric output value of the light receiving element is corrected to improve the distance measuring performance.

The adjusting device includes a light projecting element holding means for holding the light projecting element, a light projecting element moving means for moving the light projecting element in a base line direction, and a position where a target mark of a finder becomes a through image. And a light-receiving element holding unit that holds a light-receiving element. The light-receiving element adjusting unit includes an adjustment position index that is disposed on the light-emitting element, a light-emitting position detection unit that detects that the emission image of the light-emitting element matches the adjustment position index. Light-receiving element moving means for moving the light-receiving element in the base line direction; adjusting light irradiating means for emitting adjustment light from a predetermined position toward the light-receiving element; and light-receiving position detecting means for detecting an appropriate light-receiving position of the light-receiving element. A light-receiving element adjustment unit having: and an electric supply unit for supplying electricity to the light-emitting element and the light-receiving element to operate them, and an element fixing unit for fixing the light-emitting element and the light-receiving element after positioning to the base member. Are those that form.

Further, the light projecting element and the light receiving element are respectively mounted on a frame member, the positions are adjusted by holding these frame members, and the frame member is fixed to the base member using element fixing means. Things.

Further, the element fixing means uses a photo-curable adhesive, and is composed of a coating means for applying the photo-curable adhesive and a curing means for curing the photo-curable adhesive.

Further, the position of the finder is adjusted so that the through image of the target mark coincides with the light projecting position of the light projecting element.

[0015]

FIG. 1 is an external perspective view showing an example of a camera in which a distance measuring unit adjusted according to the present invention is incorporated. The camera 2 includes a substantially rectangular camera body 3 in which various photographing mechanisms are incorporated, and a box-shaped slide cover 4 attached to the outside of the camera body 3 so as to cover the camera body 3 from the side. A shutter button 5 is mounted on the upper surface of the slide cover 4. Camera 2
In the case of non-photographing, the slide cover 4 covers most of the camera body 3 when taking a picture, so that the camera can be made compact. At the time of photographing, the slide cover 4 is pulled out so as to expose a part of the camera body 3. According to this, it is possible to easily hold the camera 2 by using the slide cover 4 as a grip, and it is possible to prevent a photographing error such as a finger catch.

The camera body 3 holds the taking lens 6, and is collapsed in the camera body 3 when the power of the camera body 3 is turned off, and is moved out when turned on. And a strobe light emitting unit 8 rotatable between a storage position stored in the camera body 3, a battery cover 9 for opening and closing a battery chamber provided behind the strobe light emitting unit 8, and an object side finder. Window 10,
A light receiving window 11 for light measurement, a light projecting window 12 for distance measurement of an active distance measuring unit, a light receiving window 13 for distance measurement, and the like are provided.

FIG. 2 is an exploded perspective view showing the configuration of an active distance measuring unit incorporated in the camera body 3. The distance measuring unit includes a fixed lens barrel 15 which is a base member attached to the main body base 25 of the camera body 3, a light projecting element 16, a light projecting element holding frame 17, a prism lens 18, a light receiving element 19, and a light receiving element holding frame 20. , A light receiving lens 21, a photometric element 22, a photometric lens 23, and the like.

The fixed lens barrel 15 is formed in a block shape using, for example, plastic. On both side surfaces of the fixed lens barrel, four positioning holes 15a to 15d are provided.
By inserting the positioning pins 27a to 27d of
The fixed lens barrel 15 is attached to the main body base 25. A movable lens barrel 7 in which the photographing lens 6 is incorporated is incorporated in the opening 15e of the fixed lens barrel 15.

The main body base 25 has a patrone chamber 29 for accommodating a patrone, and a film roll chamber 30 for taking up a photographic film drawn from the patrone. A fixed lens barrel 15 is mounted between the patrone chamber 29 and the film roll chamber 30, and a finder unit 31 is mounted above the film roll chamber 30.

As the light emitting element 16, for example, an infrared light emitting diode (IRED) is used. This light emitting element 16
Is attached by bonding to a light projecting element holding frame 17 having a substantially L-shaped cross section made of plastic. The light projecting element holding frame 17 has a protruding piece 17 a to be clamped when the light emitting element holding frame 17 is attached to the fixed lens barrel 15, and a slit 32 above the fixed lens barrel 15.
An insertion piece 17b inserted into the inside, a fixing piece 17c used for fixing the light emitting element holding frame 17, and a light emitting element 16
And an opening 17d through which the light projected from the light source passes. After the positioning of the light emitting element 16, the insertion piece 17b
, The fixed piece 17c and the fixed lens barrel 15
Are bonded to each other between the projections 33.

Further, a flexible printed board 35 is attached to the light projecting element 16, and is connected to a control circuit of the camera via the flexible printed board 35.

The prism lens 18 is provided integrally with a prism 18a that bends the light projected from the light projecting element 16 by 90 degrees and reflects it toward a subject, and light projecting lenses 18b and 18c. . This prism lens 18
Is incorporated in the prism mounting portion 37 above the fixed lens barrel 15, and one light projecting lens 18c is inserted into the opening 37a.

As the light receiving element 19, for example, a position detection sensor (PSD) is used. This light receiving element 19
It is attached to a light receiving element holding frame 20 formed of plastic in a block shape. The light receiving element 19 is a light emitting element 1
6 is a light projecting lens 1 of a prism lens 18 to which light is irradiated.
8c is attached to the light receiving element holding frame 20 while being inclined in the direction toward 8c. Further, a flexible printed board 39 is attached to the light receiving element 19, and is connected to a control circuit of the camera via the flexible printed board 39.

The light-receiving element holding frame 20 has a protruding piece 20a to be clamped when the light-receiving element holding frame 20 is attached to the fixed barrel 15, and a fixed barrel 1
Engaging groove 20b which engages with the positioning projection provided on
And an opening 20c that allows light reflected by the subject to pass to the light receiving element 19. Light receiving element holding frame 20
Is a light receiving element mounting portion 4 provided below the fixed lens barrel 15.
After the light receiving element 19 is positioned, the space between the light receiving element holding frame 20 and the fixed lens barrel 15 is bonded. The light receiving lens 21 is mounted in the opening 41a of the light receiving element mounting portion 41.

Above the fixed lens barrel 15, a prism lens 18
The position opposite to the position where the
2 is provided with a photometric element mounting portion 43 to which the photometric element 2 is mounted. The photometric lens mounting portion 43 incorporates the photometric lens 23 from the front and the photometric element 22 from the rear.

FIG. 3 is an explanatory view showing the appearance of a holding jig used in the light emitting element adjusting section of the distance measuring unit position adjusting device for positioning and fixing the light emitting element and the light receiving element of the distance measuring unit. is there. The holding jig 45 includes a base 46.
And a holding portion 47 provided on the base portion 46. The holding jig 45 is movable between an attachment / detachment position where the fixed lens barrel 15 is attached and detached and an adjustment position where the position adjustment and fixing of the light projecting element 16 are carried out. The holding portion 47 of the holding jig 45 has a pin 47 inserted into the positioning holes 15 a to 15 d of the fixed lens barrel 15.
a to 47d are provided.

FIG. 4 is a perspective view showing the configuration of the adjustment position of the light emitting element adjustment unit of the distance measurement unit position adjustment device. At the adjustment position of the light projecting element adjustment unit, a chuck 49 is provided for gripping the projecting piece 17a of the light projecting element holding frame 17 to which the light projecting element 16 is attached. An automatic XZ table 50 for transporting to the upper part of the table and performing position adjustment, a dispenser 51 for supplying a UV curing adhesive between the fixed lens barrel 15 and the light-projecting element holding frame 17,
A UV lamp 52 for curing the curing adhesive and the light emitting element 1
6, a light projecting prober 53 that contacts the conductive portion of the flexible printed circuit board 35 to supply electricity to operate the light projecting element 16, and a chart plate 54 to which light emitted from the light projecting element 16 is irradiated. It comprises a CCD camera 55 for imaging the projection light applied to the chart plate 54. The chart plate 54 is arranged at a position corresponding to a through image of the target mark of the finder unit 31.

FIG. 5 is an explanatory view showing the appearance of a holding jig used in the light receiving element adjusting section of the distance measuring unit position adjusting device. The holding jig 56 includes a base portion 57 and a holding portion 58 provided on the base portion 57. The holding jig 56 is movable between an attachment / detachment position where the fixed lens barrel 15 is attached and detached and an adjustment position where the position adjustment and fixing of the light projecting element are carried out. The holding portion 58 of the holding jig 56 has a positioning hole 1 of the fixed lens barrel 15.
Pins 58a to 58d to be inserted into 5a to 15d are provided. The fixed barrel 15 holds the holding jig 5 so that the position of the light receiving element 19 can be adjusted in the horizontal and vertical directions.
6 is held inclined.

FIG. 6 is a perspective view showing the configuration of the adjustment position of the light receiving element adjustment unit. In the adjustment position of the light receiving element adjustment part,
An automatic XY table 61 for providing a chuck 60 for gripping the projecting piece 20a of the light receiving element holding frame 20 to which the light receiving element 19 is attached, moving the light receiving element holding frame 20, transferring it to the lower part of the fixed lens barrel 15, and adjusting the position. A dispenser 62 that supplies a UV curing adhesive between the fixed lens barrel 15 and the light receiving element holding frame 20, and a UV that cures the UV curing adhesive
The lamp 63 contacts the conductive part of the flexible printed circuit board 35 of the light projecting element 16 to supply electricity to operate the light projecting element 16 and the conductive part of the flexible printed circuit board 39 of the light receiving element 19. A light receiving prober 65 for supplying electricity to operate the light receiving element 19 and a reflector 66 for reflecting light emitted from the light projecting element 16.

Next, the operation of the above embodiment will be described with reference to the flowcharts of FIGS. As shown in FIG. 3, the fixed lens barrel 15 is supplied to the distance measuring unit position adjusting device, and the holding jig 45 at the attachment / detachment position of the light emitting element adjustment unit is provided.
Attached to.

The holding jig 4 to which the fixed lens barrel 15 is attached
5 is moved to the adjustment position shown in FIG. In this adjustment position, the light emitting element holding frame 1 to which the light emitting element 16 is attached is mounted.
7 are handled by the chuck 49. Then, the operation of the XZ table 50 moves the light projecting element holding frame 17 to a reference position above the fixed lens barrel 15.

After the light projecting element holding frame 17 is moved to the reference position, the dispenser 51 approaches the fixed lens barrel 15, and the UV curing adhesive is applied to several places between the fixed lens barrel 15 and the light emitting element holding frame 17. Drip. The dispenser 51 to which the UV curing adhesive has been dropped moves to a position away from the fixed lens barrel 15. Thus, the UV curing adhesive attached to the tip of the dispenser 51 during UV irradiation is not cured, and the dispenser 51 is not clogged.

Next, the light projecting prober 53 is
And contacts the conducting portion of the flexible printed circuit board 35 to supply electricity. As a result, the light projecting element 16 starts operating and emits distance measuring light. The light emitted from the light projecting element 16 is applied to the chart plate 54 via the prism lens 18. The distance measuring light applied to the chart plate 54 is a CCD.
The image is taken by the camera 55. The image captured by the CCD camera 55 is compared with a preset reference image. Then, so that the captured image approximates the reference image,
The position of the light projecting element 16 is adjusted by the XZ table 50.

When the position adjustment of the light projecting element 16 is completed, U
The V lamp 52 is turned on to cure the UV curing adhesive.
Thus, the light projecting element holding frame 17 is fixed to the fixed lens barrel 15, and the chuck 49 releases the handling of the protruding piece 17a. The holding jig 45 moves toward the attaching / detaching position again, and the fixed lens barrel 15 to which the light emitting element 16 is attached is removed from the holding jig 45.

The fixed lens barrel 1 in which the adjustment of the light projecting element 16 is completed.
Reference numeral 5 is attached to a holding jig 56 shown in FIG.

Holding jig 5 to which fixed lens barrel 15 is attached
6 is moved to the adjustment position shown in FIG. In this adjustment position, the light receiving element holding frame 2 to which the light receiving element 19 is attached is mounted.
The zero protruding piece 20a is handled by the chuck 60. Then, by the operation of the XY table 61, the light receiving element holding frame 20 is moved to the reference position below the fixed lens barrel 15.

After the light receiving element holding frame 20 is moved to the reference position, the dispenser 62 approaches the fixed lens barrel 15, and a UV curable adhesive is dropped at several places between the fixed lens barrel 15 and the light receiving element holding frame 20. I do. The dispenser 62 into which the UV curing adhesive has been dropped moves to a position away from the fixed lens barrel 15.
Thus, the UV curing adhesive attached to the tip of the dispenser 51 during UV irradiation does not harden and the dispenser 51 does not clog.

Next, the light projecting prober 64 is
And contacts the conducting portion of the flexible printed circuit board 35 to supply electricity. As a result, the light projecting element 16 starts operating and emits distance measuring light. The light emitted from the light projecting element 16 is applied to the reflecting plate 66 via the prism lens 18. At the same time, the light receiving prober 65 comes into contact with the conductive portion of the flexible printed circuit board 39 of the light receiving element 19 to supply electricity. As a result, the light receiving element 19 starts operating.

The distance measuring light reflected by the reflection plate 66 enters the light receiving element 19. At this time, the electric output value of the light receiving element 19 is compared with a preset reference value, and the position of the light receiving element 19 is adjusted by operating the XY table 61 so as to fall within the reference value.

When the position adjustment of the light receiving element 19 is completed, U
The V lamp 63 is turned on to cure the UV curing adhesive.
As a result, the light receiving element holding frame 20 is fixed to the fixed lens barrel 15, so that the chuck 60 releases the handling of the protruding piece 20a. The holding jig 56 moves toward the attachment / detachment position again, and the fixed lens barrel 15 to which the light emitting element 19 is attached is removed from the holding jig 56.

The fixed lens barrel 15 to which the light projecting element 16 and the light receiving element 19 are mounted is mounted between the patrone chamber 29 and the film roll chamber 30 of the main body 25 of the camera body 3 as shown in FIG. Can be Next, the finder unit 31 is attached to the upper part of the film roll chamber 30. At the time of the function inspection after the completion of the assembly of the camera 2, the electric output value of the light receiving element 19 is corrected to improve the distance measurement performance. The correction value of the electric output value is stored in an EEPROM in which various data used for controlling the camera are stored.

In the above embodiment, the light projecting element and the light receiving element are supplied by the respective adjustment units. However, the light emitting element and the light receiving element are temporarily assembled to the fixed lens barrel first, and then supplied to the distance measuring unit position adjusting device. You may do so. In addition, although the attachment / detachment position for attaching / detaching the fixed lens barrel to / from the holding jig and the adjustment position are provided separately, they may be combined.

Further, instead of capturing the image of the distance measuring light projected on the chart plate, the distance measuring light may be directly detected by using a detecting element. In addition, the position of the element with respect to the image processing and the electric output value can be determined by an operator or automatically controlled by feedback control.

The means for fixing the holding frame is not limited to the photo-curing type, but is particularly limited as long as the fixed lens barrel and the holding frame are stably fixed, such as a chemical reaction type, a moisture curing type, and a heat welding type. It is not something to be done. Further, it is desirable that the application position of the adhesive be constant in consideration of stable adhesive performance and work efficiency, but it may be changed according to the shape of the fixing means or the fixing portion to be used. Further, the application of the adhesive was performed before the position adjustment of the element, but may be performed after the position adjustment.

Although the light reception adjustment is performed using the light emission of the light projecting element, a light projecting unit incorporated in a position adjusting device other than the distance measuring unit may be used. In the case of an element whose light emitting position and light receiving position with respect to the outer diameter shape are known,
The adjustment can also be performed by performing image processing of the mounting position of the element without actually performing light emission and light reception. Further, the position of the element is adjusted based on the design position of the through image of the viewfinder. However, the light emitting element or the light receiving element may be used as a reference, or a reference may be provided in the position adjusting device.

Although the position of the light emitting element is adjusted and fixed first, the light receiving element may be adjusted first. Further, the light emitting element and the light receiving element may be adjusted and fixed at the same time.

Further, in order to prevent the UV curing adhesive adhered to the dispenser from being cured, the dispenser is moved away from the fixed lens barrel after the adhesive is applied. However, a shutter is provided at the tip of the dispenser to irradiate the UV. It may not be performed. Further, a filter that cuts a wavelength that is not necessary for curing the adhesive may be attached to the UV lamp so that the element and the fixed lens barrel are not affected by heat.

Further, the present invention can be used for adjusting the position of a projection / receiving element of a device other than a camera, such as binoculars and a measuring instrument, using active autofocus.

[0049]

As described above, according to the method and apparatus for adjusting the position of the light projecting element and the light receiving element of the distance measuring unit according to the present invention, since the adjusting mechanism is not provided in the camera itself, the size and cost of the camera can be reduced. Down can be achieved.

Further, since the finder and the distance measuring unit can be provided separately, the degree of freedom of the component configuration increases, and the efficiency of production and the cost can be reduced.

Further, since the photo-curing adhesive is used for fixing the element, the operation time from adjustment to fixing can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing an example of a camera using a distance measuring unit adjusted in the present invention.

FIG. 2 is an exploded perspective view showing a configuration of a distance measuring unit.

FIG. 3 is a perspective view showing a shape of a holding jig of the light emitting element adjustment unit.

FIG. 4 is an explanatory diagram illustrating a configuration of a light emitting element adjustment unit.

FIG. 5 is a perspective view showing a shape of a holding jig of the light receiving element adjustment unit.

FIG. 6 is an explanatory diagram illustrating a configuration of a light receiving element adjustment unit.

FIG. 7 is a flowchart illustrating an adjustment order of a finder and a distance measuring unit.

FIG. 8 is a flowchart illustrating an adjustment order of the light projecting elements.

FIG. 9 is a flowchart illustrating an adjustment order of a light receiving element.

[Explanation of symbols]

 2 Camera 3 Camera body 11 Metering window 12 Distance measuring light emitting window 13 Distance measuring light receiving window 15 Fixed lens barrel 16 Light emitting element 17 Light emitting element holding frame 18 Prism lens 19 Light receiving element 20 Light receiving element holding frame 31 Finder unit 49, Reference Signs List 60 chuck 50 XZ table 51, 62 dispenser 52, 63 UV lamp 53, 64 light-emitting prober 54 chart plate 55 CCD camera 61 XY table 65 light-receiving prober 66 reflector

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G03B 13/20 G02B 7/11 B 2H102 17/02 Z 17/20 G03B 3/00 A F-term (Reference) 2F112 AA06 BA00 BA10 CA02 GA10 2H011 BA11 DA00 2H018 AA02 BC01 BE01 BE02 2H051 BB20 CA16 2H100 BB01 BB05 BB06 BB09 2H102 AA44 BB01 BB02 CA34

Claims (7)

[Claims] 1. A distance measuring unit comprising: a light projecting element for projecting light toward a subject within a target mark of a finder; a light receiving element for receiving light reflected by the subject; and a base member to which these are attached. In the position adjusting method of the light emitting element and the light receiving element, an adjustment position index is arranged at a position where a through image of a target mark of a finder is formed, and the position of the light emitting element is adjusted so that a light emission image of the light emitting element matches the adjustment position index. A position adjusting method of the light projecting element and the light receiving element of the distance measuring unit, wherein 2. A distance measuring unit comprising: a light emitting element for projecting light toward a subject within a target mark of a finder; a light receiving element for receiving light reflected by the subject; and a base member to which these are attached. In the position adjusting method of the light projecting element and the light receiving element, the position of the light receiving element is moved in accordance with the adjustment light emitted from a predetermined position, and the light projecting element and the distance measuring unit are attached to the base member. How to adjust the position of the light receiving element. 3. The distance measurement performance is improved by correcting the electric output value of the light receiving element in a state where the finder is combined with the light projecting element and the light receiving element.
Or the position adjusting method of the light emitting element and the light receiving element of the distance measuring unit according to 2. 4. A distance measuring unit comprising: a light emitting element for projecting light toward an object within a target mark of a finder; a light receiving element for receiving light reflected by the object; and a base member to which these are attached. In a position adjusting device for a light emitting element and a light receiving element, a light emitting element holding means for holding the light emitting element, a light emitting element moving means for moving the light emitting element holding means in a base line direction, and a target mark of a finder A light projecting element adjustment unit having an adjustment position index disposed at a position that becomes a through image of the light emitting element, and a light projecting position detecting unit that detects that a light emission image of the light projecting element matches the adjustment position index; Light receiving element holding means for holding the light receiving element, light receiving element moving means for moving the light receiving element holding means in the direction of the base plane, and adjusting light irradiation for irradiating adjustment light from a predetermined position toward the light receiving element. Means, a light receiving element adjusting unit having a light receiving position detecting means for detecting an appropriate light receiving position of the light receiving element, an electricity supply means for supplying electricity to the light emitting element and the light receiving element to operate the light emitting element, and a light emitting after positioning. An element fixing means for fixing an element and a light receiving element to a base member, comprising: a position adjusting device for a light emitting element and a light receiving element of a distance measuring unit. 5. The light-emitting element and the light-receiving element are attached to a frame member, respectively, and these frame members are held by respective holding means for position adjustment, and the frame member is fixed to the base member by element fixing means. 5. The position adjusting device for a light projecting element and a light receiving element of a distance measuring unit according to claim 4, wherein: 6. The element fixing means is made of a photo-curable adhesive, and is comprised of an application means for applying the photo-curable adhesive, and a curing means for curing the photo-curable adhesive. The position adjusting device for a light emitting element and a light receiving element of the distance measuring unit according to claim 4. 7. A camera using a distance measuring unit adjusted by using the method and apparatus for adjusting the position of the light projecting element and the light receiving element of the distance measuring unit according to claim 1. A camera that adjusts the position of a finder so that a through image of a target mark coincides with a projection position.