JP2001183754A - Mirror structure for optical device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the space occupied by a plate-like mirror without sacrificing the area of a reflection face by chamfering the back side of the end face of the mirror in accordance with inclination of the reflection face in an optical device provided with the mirror which is arranged so as to have the reflection surface inclined. SOLUTION: When a mirror 11 is arranged with a reflection face 11a inclined downward, an upper end face 11c of the mirror 11 is so chamfered that it may be horizontal, and thus interference with another member 55a is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mirror structure of an optical device, and more particularly, to a mirror structure of an optical device having a plate-like mirror whose reflection surface is inclined.

[0002]

2. Description of the Related Art A general photographic printing apparatus used conventionally has, for example, a structure schematically shown in FIG. That is, a light source unit 42 for illuminating a print target frame set in the negative carrier unit 41 is provided on an upper portion of the main body 2 of the photoprinting apparatus 1, and light transmitted through the print target frame is converted into a film image print lens 43. Thereby, an image is formed on the photosensitive material (paper) 44. The paper 44 is pulled out from the roll paper 45 and set at a printing position. The exposed paper 44 is sent to a developing processing unit 47 through a printing unit 46, developed, and then dried in a drying unit 48. It is configured to be sent to the sorter unit 50. There is a space 51 between the film image printing lens 43 and the paper print position thereunder. This space 51 has a special exposure device, for example, a mask used for bordering photographs. The unit and the like are detachably mounted.

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. There is an increasing demand for color photographic printing equipment.

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, Japanese Patent Application Laid-Open No. 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 arranged above T, and a second mirror (main mirror) is arranged above the photosensitive material. A digital image printing lens is arranged between these mirrors. Light is guided to the photosensitive material via the first and second mirrors, and the first and second mirrors are extracted from the optical path when an analog image is printed. Each of the first and second mirrors is disposed with its reflecting surface obliquely downward (about 45 °).

However, as described above, there is an increasing demand for a photographic printing apparatus capable of selectively printing 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 photo 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.

The digital kit includes a digital image display unit including a CRT as a video image display means, and an optical unit including a mirror and a lens for exposing the image displayed on the CRT onto paper. You. As described above, a special exposure apparatus, for example, a mask unit or the like used for adding a border to a photograph may be inserted into the space 51 and used. FIG. 10 shows an optical unit having a mechanism for switching the optical path between
It is conceivable that the photo printing apparatus 1 is detachably mounted in the space 51 of the photo printing apparatus 1 shown in FIG.

[0007]

However, since there is a demand that the image printed by the optical unit be as large as possible, the light beam emitted in the horizontal direction from the video image printing lens is reflected toward the lower paper. The main mirror (the second mirror in the photographic printer disclosed in Japanese Patent Application Laid-Open No. 63-257742) is required to have a particularly large reflecting surface and a high surface flatness.

On the other hand, the optical unit must be constructed so as to be able to be inserted into a limited space of the photographic printing apparatus, so that the height dimension is particularly limited, but the precision of the mirror is to be improved. For example, when the mirror is arranged with its reflecting surface obliquely downward at about 45 °, the upper surface of the back surface of the mirror is one thickness thicker than the upper edge of the reflecting surface. As the height of the mirror increases, it becomes an obstacle to efforts to reduce the overall height of the optical unit.

In view of the above circumstances, an object of the present invention is to provide a mirror structure of an optical device which can satisfy both conflicting demands for downsizing an optical unit and increasing the size of a main mirror. Things.

[0010]

According to the present invention, there is provided an optical device having a plate-like mirror arranged such that a reflection surface of the surface is inclined with respect to a vertical plane or a horizontal plane. The back surface is provided with an end surface chamfered corresponding to the angle.

In a preferred embodiment of the present invention, the mirror is arranged so that its reflection surface is inclined obliquely downward by about 45 °, and is chamfered so that the upper end surface of the mirror is substantially horizontal.

[0012] With this configuration, a video image displayed on the video image display device is provided to a photographic printing device having a function of printing a film image on a photosensitive material surface and having a video image display device fixed thereto. To print on the surface,
It is preferably applied to an optical device which is provided with a lens for video image printing and which is detachably mounted, in which case,
The mirror is used as a mirror for reflecting a light beam from the video image printing lens toward the photosensitive material surface.

Further, the mirror makes its reflection surface approximately 45 °.
When the mirror is disposed obliquely upward, the mirror may be chamfered so that the lower end surface is substantially horizontal.

[0014]

According to the present invention, since the above-mentioned mirror is provided with an end face whose back surface is chamfered corresponding to the inclination angle of the reflection surface, space can be saved without sacrificing the area of the reflection surface. Becomes possible.

[0015] For example, the above-mentioned mirror makes its reflection surface approximately 45 degrees.
° When the mirror is positioned obliquely downward, the upper end surface of the mirror is chamfered so that it is almost horizontal. Since the height dimension of the mirror can be reduced to 1 / √2, it is suitable for application to the above-described optical unit.

Further, the mirror makes its reflection surface approximately 45 °.
When the mirror is arranged obliquely upward, the lower end surface of the mirror is chamfered so as to be substantially horizontal, so that the mirror is not chamfered.
The height dimension of the mirror can be reduced to 1 / √2 of the thickness of the mirror.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIGS. 1 and 2 show only a main part in a state where a digital kit including an optical unit to which the present invention is applied is attached to a photographic printing apparatus having substantially the same configuration as that shown in FIG. It is the schematic front view and side view shown transparently. FIG. 3 is an explanatory diagram schematically showing the configuration of the digital kit.

In the figure, a digital kit 3 includes a digital image display unit 5 fixedly attached to the front of a main body 2 of a photographic printing apparatus 1 including a CRT 4 with a display screen 4a facing upward, and a digital image display unit 5 fixed to the main body 2. And an optical unit 6 (optical device) removably mounted in the space 51 of FIG. 10 from the front side along a rail (not shown).

The optical unit 6 includes a filter turret 8 having three color filters 7R, 7G, and 7B.
And a sub-mirror 9 for horizontally reflecting image light transmitted vertically upward through one of the three color filters 7R, 7G, 7B of the filter turret 8, and an image light reflected by the sub-mirror 9. 10A and 10B having a horizontal optical axis for forming an image on paper
And a main mirror 11 for reflecting image light emitted from one of the lenses 10A and 10B toward paper.

The filter turret 8 is a CRT 4
Is provided to convert a red component image, a green component image, and a blue component image, which are monochrome images, sequentially displayed three times on the display screen 4a into a red image, a green image, and a blue image, respectively. The main mirror 11
Is provided to switch between film image printing and digital printing.
The main mirror 11 is connected to guide shafts 16
And is retracted to the left in FIG. 3 to allow exposure of the film 44 to the surface of the paper 44 through the film image printing lens 43 in FIG.

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, thereby exposing the display screen 4a. The operations of the digital image display unit 5 and the optical unit 6 are controlled by the control unit 13.

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 used for the housing frame 1 of the optical unit 6.
5 are slidably supported on two pipe-like guide shafts 16, 16 which are parallel and horizontally bridged along both side walls extending in the longitudinal direction (the left-right direction in FIG. 4). In this case, the mirror holder 14 includes support arms 14a, 14a supported by the guide shafts 16, 16 with the guide shafts 16, 16 respectively penetrating therethrough.
b is provided integrally on both sides, but one of the support arms 14
a extends long along the guide shaft 16, and a rack 17 is engraved on the support arm portion 14a along its longitudinal direction.

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

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 frame 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 moving base driving mechanism 24 is provided. .

The lens moving base drive mechanism 24 is composed of two parallel pipe-shaped guide shafts 25, which are bridged in a direction perpendicular to the guide shafts 16, 16 and horizontally.
25, a lens moving table 26 slidably supported along guide shafts 25, 25, and two video image printing lenses 10A, 1 on the lens moving table 26.
OB are respectively held and arranged in lens brackets fixed on the lens moving base 26.

A rack 27 extending parallel to the guide shaft 25 is fixed to the front surface of the lens moving base 26 parallel to the guide shaft 25 by screws or the like. A lens switching motor (pulse motor) 28 is fixed to the housing frame 15, and a pinion 31 connected to a rotation shaft of the motor 28 via a reduction gear meshes with the rack 27. Accordingly, the lens moving base 26 moves in the vertical direction in FIG. 4 with the forward / reverse rotation of the motor 28,
A selected one of the lenses 10A and 10B is configured to intervene in an optical path connecting the mirrors 9 and 11.

The photoelectric sensor 32 is fixed to the housing frame 15 in the direction in which the rack 27 projects.
Intervenes between the light emitting element and the light receiving element of the photoelectric sensor 32 so that light incident on the light receiving element is blocked,
Thereby, the origin position of the lens moving table 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 lens moving base 26 may be driven by the motor 28 for the number of drive pulses of the motor 28 set for each of the optional lenses 10B.

FIG. 5 is a plan view transparently showing a main part of the optical unit 6 shown in FIG. FIG. 6 is a schematic vertical sectional view showing a positional relationship of the optical unit 6 with respect to a black shutter portion 54 provided in the photographic printing apparatus main body 2.
7 is a front view thereof, and FIG. 8 is an enlarged view of a main part of FIG.
In FIGS. 5 and 6, the mirror holder 14 is located at the right end of the moving range, and holds the main mirror 11 at a position where a video image can be printed.

In FIG. 5, metal fittings 52a, 52b and 52c are screwed to the mirror holder 14 made of a plastic material, and both ends of the main mirror 11 are reflected on the reflecting surface 1.
1a is held so as to face obliquely downward (about 45 °). The support arm 14 a on which the rack 17 is engraved is formed integrally with the mirror holder 14 at one end of the mirror holder 14.

In FIG. 6, light emitted from the image display surface 4a facing above the CRT 4 is reflected in the horizontal direction by the sub-mirror 9, and passes through the selected one of the lenses 10A and 10B to the main mirror 11. Then, the light is reflected downward by the reflection surface 11a of the main mirror 11, and the image is formed on the paper 44 below. At the time of film image printing, the mirror holder 14 moves along the guide shafts 16, 16 so that the main mirror 11 is retracted to a position indicated by a virtual line in FIG. 6.

On the other hand, in the photographic printing apparatus main body 2, a black shutter portion 54 for printing a film image is disposed immediately above the optical unit 6. The black shutter portion 54 is suspended at a predetermined interval in the insertion direction of the optical unit 6 into the photoprinting apparatus main body 2.
There are shutter blades 56, 56 fixed to the rotating shafts 55, 55, respectively. Each rotating shaft 55 is rotated by a driving motor 57 shown in FIG. The shutter blades 56, 5
6, the image recorded on the color negative film is formed on the lower paper 44 by the film image printing lens 43 (FIG. 10).

The lower end portion 55a of the rotating shaft 55 of the black shutter portion 54 is close to the upper surface 14c of the mirror holder 14 of the optical unit 6, as is apparent from FIG.
The upper end surface of the main mirror 11 is chamfered on the back surface 11b so as to be flush with the upper surface 14c of the mirror holder 14, thereby forming a substantially horizontal end surface 11c. 55 lower end 55a
To prevent interference.

As a method of chamfering the mirror, cutting, polishing, molding, or the like can be considered. These are the same whether the material is glass or plastic.

As is apparent from the above description, in the present embodiment, the back surface 11b at the upper end of the main mirror 11 is provided.
Since the side is chamfered to form a substantially horizontal upper end surface 11c which is flush with the upper surface 14c of the mirror holder 14, it is possible to cope with space restrictions without sacrificing the area of the reflection surface 11a. You can.

The above-described embodiment is a case where the present invention is applied to the optical unit 6 of the photographic printing apparatus 1, but the present invention can be applied to various optical devices.

For example, FIG. 9 is a schematic diagram in which the present invention is applied to an image input device (RIS) disclosed in Japanese Patent Application Laid-Open No. Hei 8-110585. The image input device 60 includes an image reading unit 61 for reading an original, a platen glass 62 provided above the image reading unit 61 for mounting the original, and an openable and closable above the platen glass 62. And a light-shielding cover 63 that blocks external light when reading a document.

The image reading unit 61 includes a lamp unit 70, a reflection mirror unit 71, a lens unit 72, a correction mirror unit 73, and a fixed mirror M6.
And the like, all of which are housed in a casing 64 formed of a light shielding structure. The lamp unit 70 includes a light source lamp 75 for irradiating the original with light, and a first reflection mirror M1 for reflecting light scanned on the original toward the reflection mirror unit 71, and is slidably held in the original scanning direction. ing.

The reflection mirror unit 71 includes second and third reflection mirrors M2 and M3, and directs the light reflected by the first reflection mirror M1 to the lens unit 72 via the second and third reflection mirrors M2 and M3. Reflect. The reflection mirror unit 71 is slidably supported in the document scanning direction, and moves in conjunction with the movement of the lamp unit 70.

The lens unit 72 has an imaging lens 76 and is slidably supported along the optical axis. The light reflected from the reflection mirror unit 71 is condensed by the imaging lens 76 and By moving the lens back and forth along the axis, the focal length can be changed and the magnification can be adjusted.

The correction mirror unit 73 includes first and second correction mirrors M4 and M5, and transfers the light beam focused by the imaging lens 76 to the fixed reflection mirror M6 via the first and second correction mirrors M4 and M5. Reflect toward. The correction mirror unit 73 is slidably supported in the same direction as the lens unit 72, and moves in conjunction with the lens unit 72 to correct a focus shift during zooming. The fixed reflection mirror M6 is configured to reflect the light beam reflected by the correction mirror unit 73 and guide the light beam to photographic paper (not shown).

In the above configuration, the reflection mirrors M1 to M
6 are all arranged with their reflection surfaces inclined at 45 °, the blackened portions of the mirrors M1 to M6 are chamfered by the present invention. That is, in FIG. 9, mirrors M1 and M with the reflecting surface facing obliquely upward
The mirrors M3 and M5 each have a rear surface chamfered so that the upper end surface is vertical and the lower end surface is horizontal.
The back surfaces of M4 and M6 are chamfered such that the upper end surfaces are horizontal and the lower end surfaces are vertical.

Also in this embodiment, each of the mirrors M1 to M1
Clearly, by chamfering the back surface of the upper and lower end surfaces of the M6 according to the inclination angle of the reflection surface, it is possible to reduce the space in the height direction and the left and right direction of the mirror without sacrificing the area of the reflection surface. It is. The present invention is best demonstrated in an optical device having such a large number of reflection mirrors.

The present invention can be applied to an image output device (ROS), and can also be applied to a mirror whose reflection surface has an inclination angle other than 45 °. The chamfering may be performed according to the inclination angle of the reflection surface.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing only essential parts in a state where a digital kit including an optical unit 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 the configuration of a digital kit.

FIG. 4 is a plan view of an optical unit to which the present invention is applied.

FIG. 5 is a plan view showing a main part of the optical unit shown in FIG. 4;

FIG. 6 is a schematic longitudinal sectional view showing a positional relationship of an optical unit with respect to a black shutter section provided in the main body of the photo printing apparatus.

FIG. 7 is a front view thereof.

FIG. 8 is an enlarged view of a main part of FIG. 6;

FIG. 9 is a schematic diagram of an image input device showing another embodiment of the present invention.

FIG. 10 is a schematic configuration diagram of a conventional photographic printing apparatus.

[Description of Signs] 1 Photo printing device 2 Body of photo printing device 3 Digital kit 4 CRT 4a Display screen 5 Digital image display unit 6 Optical unit (optical device) 7R, 7G, 7B Color filter 8 Filter turret 9 Sub mirror 10A, 10B Lens for video image printing 11 Main mirror 12 CRT display screen protection shutter 13 Control unit 14 Mirror holder 15 Housing frame 16 Guide shaft 17, 27 Rack 18, 31 Pinion 19 Main mirror driving motor 20, 23, 32 Photoelectric sensor 21 Micro switch 22 Filter driving motor 24 Lens moving base driving mechanism 26 Lens moving base 28 Lens switching motor 43 Film image printing lens 44 Paper (photosensitive material) 54 Black shutter Part 55 Rotation axis 56 Shutter blade 60 Image input device (optical device) M1 to M6 Reflection mirror

Claims (4)

[Claims] 1. An optical device having a plate-like mirror arranged with a reflection surface on the front surface inclined, wherein the mirror has an end surface whose back surface is chamfered corresponding to the inclination angle of the reflection surface. A mirror structure of an optical device, characterized in that: 2. The mirror according to claim 1, wherein the mirror is disposed so that its reflection surface is inclined obliquely downward by about 45 °, and the mirror is chamfered so that an upper end surface thereof is substantially horizontal.
The mirror structure as described. 3. The mirror according to claim 1, wherein the mirror is disposed so that its reflection surface is inclined obliquely upward at about 45 °, and the lower end surface of the mirror is chamfered so as to be substantially horizontal.
The mirror structure as described. 4. A photographic printing apparatus having a function of printing a film image on a photosensitive material surface and having a video image display device fixed thereto, wherein a video image projected on the video image display device is printed on the photosensitive material surface. An optical device detachably mounted with a video image printing lens for printing, wherein the mirror is a mirror that reflects a light beam from the video image printing lens toward the photosensitive material surface. The mirror structure of the optical device according to claim 2.