JP2001092038A - Filter turret for optical device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure the flatness of a rotating disk in a filter turret for optical device and to detach a sensor, which detects the rotation position of the rotating disk, without detaching the rotating disk. SOLUTION: A projecting edge part 33 which projects toward a support base 36 is formed on a rotating disk 8a along its outer peripheral edge. A sensor 23 which detects the rotation position of the rotating disk 8a is so arranged that it may be placed on both sides of the projecting edge part 23 in the radial direction of the rotating disk 8a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter turret, and more particularly, to a filter turret of an optical device which is rotatably driven by providing a plurality of filters on a rotating body rotatably supported on a support base.

[0002]

2. Description of the Related Art A general photographic printing apparatus conventionally used has, for example, a structure schematically shown in FIG. That is, a light source unit 42 for illuminating a frame to be printed set in the negative carrier unit 41 is provided on the upper part of the main body 2 of the photoprinting apparatus 1. Thereby, an image is formed on the photosensitive material (paper) 44. Paper 44
Is pulled out of the roll paper 45 and set at the print position, and the exposed paper 44
After passing through the developing unit 47 to be developed, the drying is performed by the drying unit 48 and then sent to the sorter unit 50. A space 51 exists between the film image printing lens 43 and the paper print position below the film image printing lens 43. In this space 51, an optical unit for performing special printing is detachably mounted. It has become so.

Recently, with the development of digital cameras and the like,
It is possible to selectively print a film image (analog image) recorded on photographic film and a video image (digital image) displayed on a CRT on a photosensitive material, or to synthesize an analog image and a digital image. Demand for color photographic printing apparatuses is increasing.

A photographic printing apparatus for selectively printing such an analog image and a digital image displayed on a CRT on a photosensitive material is disclosed in, for example, JP-A-63-257742. In the photographic printing apparatus disclosed in this publication, an analog image printing lens and a photosensitive material are sequentially arranged below a photographic film, and a CRT having a display screen facing upward is arranged alongside the photosensitive material. A first mirror (sub-mirror) is disposed above, and a second mirror (main mirror) is disposed above the photosensitive material. A digital image printing lens is disposed between these mirrors. First and second
The first and second mirrors are led out of the optical path when an analog image is printed by guiding the photosensitive material through a mirror.

As described above, there is an increasing demand for a photographic printing apparatus that can selectively print a film image as an analog image and a video image displayed on a CRT as a digital image on a photosensitive material. That said, most small labs (labs) currently have photographic printing equipment dedicated to analog image printing, and can process both analog and digital images. A so-called digital kit, which can add a digital image printing function by a relatively simple modification to a conventional photographic printing apparatus having only an analog image printing function because a simple photographic printing apparatus is expensive. Is required.

Conventionally, in a digital exposure system for printing a video image displayed on a CRT onto a photosensitive material, a monochrome CRT and, for example, a filter turret having three color filters of R, G and B are used. I have.

FIG. 9 is a plan view of a conventional filter turret used for such an application, and FIG.
FIG. 11 is an enlarged view of a main part of FIG.

The filter turret 8 'includes a rotating disk 8a' rotatably supported on a hollow support shaft 37 erected on a support base 36. The rotary disk 8a 'includes a support shaft 37. A screw 38 penetrated and screwed to the support base 36 is locked so as not to escape from the support shaft 37, and is detachable from the support shaft 37 by removing the screw 38.

On the rotating disk 8a ', three color filters 7R, 7G, 7B are arranged at equal angular intervals.
Gear teeth 39 are engraved on the outer circumference of the rotating disk 8a 'over the entire circumference.

A filter drive motor 22 composed of a pulse motor is fixed on the support base 36 near the outer periphery of the rotating disk 8a ', and a gear (drive gear) 40 attached to the rotating shaft 22a is provided on the outer periphery of the rotating disk 8a'. It is configured to mesh with the gear teeth (driven gear) 39 to rotate the rotating disk 8a '.

On the support 36, a photoelectric sensor 23 for detecting the origin position of the filter turret 8 'is fixed near the outer periphery of the rotating disk 8a'. The photoelectric sensor 23 is generally called a photo-interrupter. As shown in FIG.
b is vertically opposed with a gap 23c therebetween, and the periphery of the rotating disk 8a 'is inserted into the gap 23c and vertically sandwiched between the light emitting section 23a and the light receiving section 23b. It has become. A hole (not shown) which penetrates the rotating disk 8a 'in the vertical direction is formed at a predetermined position on the periphery of the rotating disk 8a'.
The light emitted from the optical disk enters the light receiving portion 23b through the hole at a predetermined rotational position of the rotating disk 8a ', whereby the rotational position of the rotating disk 8a' is detected and the motor 22 is controlled. Have been.

[0012]

In the rotating disk 8a 'and the filter turret 8' provided with the rotating position detecting means, the rotating disk 8a 'tends to be distorted due to its small thickness. It was difficult to ensure flatness. For this reason, there is a possibility that the peripheral edge of the rotating disk 8a 'comes into contact with the photoelectric sensor 23.

Further, the periphery of the rotating disk 8a 'is sandwiched between the light emitting portion 23a and the light receiving portion 23b of the photoelectric sensor 23 in the vertical direction, that is, in the direction parallel to the rotation axis of the rotating disk 8a'. Then, remove the screw 38 and rotate the disk 8a '.
In order to extract the rotating disk 8a 'upward when replacing the photoelectric conversion device, there is a problem that the photoelectric sensor 23 must be removed from the support base 36. Then, once the photoelectric sensor 23 is detached, it is necessary to perform positioning when reattaching the photoelectric sensor 23.

In view of the above circumstances, an object of the present invention is to provide a filter turret which ensures the flatness of a rotating disk and does not require removing a sensor when removing the rotating disk.

[0015]

According to the present invention, there is provided a filter turret having a rotating disk formed with a protruding edge protruding toward a support base along an outer peripheral edge thereof, and a detector for detecting a rotational position of the rotating disk. However, the protruding edge portion is fixed to the support base in a manner to sandwich the protruding edge portion in the radial direction of the rotating disk.

[0016]

According to the present invention, the protruding edge portion protruding toward the support table is formed along the outer peripheral edge of the rotating disk.
As a result, the periphery of the rotating disk is reinforced, and the flatness of the rotating disk can be ensured.

Further, the detector for detecting the rotational position of the rotating disk is fixed to the support base so as to sandwich the protruding edge portion in the radial direction of the rotating disk. The rotating disk can be pulled out upward without removing the detector.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings. This embodiment is called a “digital kit” for adding a video image (digital image) printing function displayed on a CRT to a conventional photoprinting apparatus having only a film image (analog image) printing function. In this case, the present invention is applied.

FIGS. 1 and 2 show perspectively only essential parts of a photographic printing apparatus having substantially the same configuration as that shown in FIG. 8 with a digital kit to which the present invention is applied. It is a schematic front view and a side view. FIG. 3 is an explanatory diagram schematically showing the configuration of the digital kit.

In FIG. 1, a digital kit 3 includes a CRT 4 with a display screen 4a directed upward, and a photographic printing apparatus 1 including a CRT 4.
A digital image display unit 5 fixedly attached to the front surface of the main body 2 and an optical unit 6 removably attached to the space 51 of FIG. 8 from the front side along a rail (not shown) fixed to the main body 2. And is constituted by.

The optical unit 6 has a filter turret 8 provided with three color filters 7R, 7G, 7B.
And a sub-mirror 9 that horizontally reflects image light that has been transmitted vertically upward through the three color filters 7R, 7G, and 7B of the filter turret 8 in succession, and transfers the image light reflected by the sub-mirror 9 onto paper 44. Lenses 10A and 10B having a horizontal optical axis for forming an image on
A main mirror 11 for reflecting image light emitted from one of the lenses 10A and 10B downward toward the paper 44;

On the display screen 4a of the CRT 4, a monochrome image representing a three-color image of a negative image with luminance is sequentially projected, and in synchronization with this, the filter turret 8 is rotated to respectively display a red negative image and a green negative image. Image and blue negative image. The main mirror 11 is provided for switching between film image printing and digital image printing. At the time of film image printing, the main mirror 11 is guided by rails 16 and 16 described later along a horizontal optical axis as shown in FIG. It is configured to allow the film image light passing through the lens 43 for film image printing (FIG. 8) to be exposed to the surface of the paper 44 while retracting to the left.

The two lenses 10A and 10B are composed of, for example, a standard lens and an optional lens.
One of the lenses 10A and 10B is configured to be selectively interposed in the optical path according to the purpose.

The digital image display unit 5 includes:
In order to protect the display screen 4a directed upward from the CRT 4, a shutter 12 that covers the display screen 4a when the optical unit 6 is not mounted is provided. This shutter 1
2 is mechanically opened by a member of the optical unit 6 with the insertion of the optical unit 6 into the space 51 to expose the display screen 4a. Digital image display unit 5
The operation of the optical unit 6 is controlled by the control unit 35.

FIG. 4 is a plan view of the optical unit 6. The main mirror 11 is fixed to a mirror holder 14, and the mirror holder 14 is cross-linked horizontally and horizontally along both side walls extending in the longitudinal direction (the left-right direction in FIG. 4) of the housing 15 of the optical unit 6. Two pipe-shaped rails 1
It is slidably supported on 6,16. In this case, the mirror holder 14 is integrally provided on both sides with support arms 14a, 14b supported by the rails 16, 16 in such a manner that the rails 16, 16 are respectively penetrated. A rack 17 is extended along the rail 16 and a rack 17 is engraved on the support arm 14a along the longitudinal direction.

On the other hand, a mirror driving motor (DC motor) 19 in which a pinion 18 meshing with the rack 17 is mounted on a rotating shaft is fixed to the housing 15.
Thereby, the main mirror 11 is moved between an exposure position (the position shown in FIG. 4) for exposing the video image from the CRT 4 on the paper 44 and a retracted position for allowing the exposure of the film image on the paper 44. Is configured to obtain.

A photoelectric sensor 20 for stopping the main mirror 11 at the exposure position and a microswitch 21 for stopping the main mirror 11 at the retracted position are fixed to the housing 15.

In the vicinity of the filter turret 8, a filter driving motor (pulse motor) 22 and a filter origin detecting photoelectric sensor 23 are provided, and a lens driving mechanism 24 is provided.

The lens driving mechanism 24 includes the rails 16 and
Rails 25, 2 on two parallel pipe-like rails 25, 25 bridged in a direction orthogonal to 16 and horizontally.
5, a pedestal 26 slidably supported along the pedestal 5 and two video image printing lenses 10 on the pedestal 26.
A and 10B are fixed.

On the front of the base 26 parallel to the rail 25,
A rack 27 extending parallel to the rail 25 is fixed by screws or the like. A lens switching motor (pulse motor) 28 is fixed to the housing 15.
8 connected via a reduction gear to the rotating shaft 8
Are engaged with the rack 27. Accordingly, the pedestal 26 moves in the vertical direction in FIG. 4 with the forward / reverse rotation of the motor 28, and the selected one of the lenses 10A and 10B is moved.
Each is configured to intervene in the optical path connecting the mirrors 9 and 11.

The photoelectric sensor 32 is fixed to the housing 15 in the direction in which the rack 27 protrudes, and the protruding end of the rack 27 intervenes between the light emitting element and the light receiving element of the photoelectric sensor 32 so that the light receiving element The light incident on the pedestal 26 is blocked, whereby the origin position of the pedestal 26 is detected.

Standard lens 10A, optional lens 10
In order for B to intervene in the optical path, the number of drive pulses of the motor 28 is counted from this origin position, and the standard lens 10
A, the pedestal 26 may be driven by the motor 28 for the number of drive pulses of the motor 28 set for each of the optional lens 10B.

FIGS. 5 to 7 are a plan view, a sectional view, and an enlarged view of a main part of an embodiment of a filter turret according to the present invention, corresponding to FIGS. 9 to 11, respectively.

The filter turret 8 is mounted on the support base 3.
6 (in this case, housing 15), a hollow support shaft 3
7 is provided with a rotating disk 8a rotatably supported by the shaft 7, and this rotating disk 8a is stopped by a screw 38 screwed into the support 36 through the supporting shaft 37 so as not to escape from the supporting shaft 37. By removing the screw 38, the screw 38 can be removed from the support shaft 37.

On the rotating disk 8a, three color filters 7R, 7G, 7B are arranged at equal angular intervals, and gear teeth 39 are engraved on the outer circumference of the rotating disk 8a over the entire circumference. Have been.

On the rotating disk 8a, along the outer peripheral edge thereof,
Further, a protruding edge portion 33 is formed inside the gear teeth 39 so as to protrude toward the support base 36 (downward). In this protruding edge 33,
As shown in FIG. 7, a slit 34 penetrating the protruding edge portion 33 in the radial direction of the rotating disk 8a is formed at a predetermined position.

The filter drive motor 22 composed of a pulse motor is fixed on the support base 36 near the outer periphery of the rotating disk 8a, and a gear (drive gear) 40 attached to the rotating shaft 22a is provided with gear teeth on the outer periphery of the rotating disk 8a. (Driven gear)
The rotating disk 8a is configured to rotate in mesh with the rotating disk 39.

A photoelectric sensor 23 for detecting the origin position of the filter turret 8 is fixed to the support base 36 near the outer periphery of the rotating disk 8a. The photoelectric sensor 23 includes, as shown in FIG.
3b are opposed to each other in the radial direction of the rotating disk 8a with a gap 23c therebetween, and the protruding edge 33 of the rotating disk 8a is inserted into the gap 23c, and the protruding edge is formed between the light emitting portion 23a and the light receiving portion 23b. The portion 33 is sandwiched in the radial direction of the rotating disk 8a. Therefore, light emitted from the light emitting portion 23a of the photoelectric sensor 23 passes through the slit 34 of the protruding edge portion 33 at a predetermined rotation position of the rotating disk 8a, and the light receiving portion 23b
, The rotational position of the rotating disk 8a is detected, and the motor 22 is controlled.

As is apparent from the above description, according to the present embodiment, the support base 36 extends along the outer peripheral edge of the rotating disk 8a.
Since the protruding edge 33 protruding to the side is formed, the peripheral edge of the rotating disk 8a is reinforced by this, and the rotating disk 8a
Can be secured.

The photoelectric sensor 23 for detecting the rotational position of the rotating disk 8a moves the protruding edge 33 to the rotating disk 8a.
Is fixed to the support base 36 in such a manner as to be sandwiched in the radial direction, so that the rotating disk 8a can be pulled out without removing the photoelectric sensor 23 when exchanging the rotating disk 8a.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing only essential parts in a state where a digital kit to which the present invention is applied is attached to a photographic printing apparatus.

FIG. 2 is a side view thereof.

FIG. 3 is an explanatory view schematically showing a configuration of a digital kit to which the present invention is applied.

FIG. 4 is a plan view of an optical unit of the digital kit.

FIG. 5 is a plan view of a filter turret according to the present invention.

FIG. 6 is a sectional view thereof.

FIG. 7 is an enlarged view of a main part of FIG. 6;

FIG. 8 is a schematic configuration diagram of a conventional photographic printing apparatus.

FIG. 9 is a plan view of a conventional filter turret.

FIG. 10 is a sectional view thereof.

FIG. 11 is an enlarged view of a main part of FIG. 10;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Photo printing apparatus 2 Main body of photo printing apparatus 3 Digital kit 4 CRT 4a Display screen 5 Digital image display unit 6 Optical unit 7R, 7G, 7B Color filter element 8, 8 'Filter turret 8a, 8a' Rotating disk 9 Submirror 10A, 10B Video image printing lens 11 Main mirror 12 CRT display screen protection shutter 14 Mirror holder 15 Housing 16, 25 Rail 17, 27 Rack 18, 31 Pinion 19 Main mirror drive motor 20, 23, 32 Photoelectric sensor 21 Micro switch Reference Signs List 22 filter driving motor 24 lens driving mechanism 26 pedestal 28 lens switching motor 33 protruding edge part 34 slit 35 control unit 36 support base 37 support shaft 38 screw 39 gear tooth 44 paper

Claims (1)

[Claims] 1. A filter turret of an optical apparatus which is rotatably driven with a plurality of filters provided on a disk rotatably supported on a support table, wherein the support table is provided along an outer peripheral edge of the rotary disk. A protruding edge protruding to the side is formed, and a detector for detecting a rotational position of the rotating disk is fixed to the support base in a manner to sandwich the protruding edge in a radial direction of the rotating disk. Filter turret for optical equipment.