JP2579160Y2 - Scanner photometer for color photographic printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a scanner photometer for a color photographic printing machine having a device for automatically measuring the color balance of a color film to be printed.

(Prior Art) A conventional scanner photometric device in a color photographic printing machine is provided with a light source for a device for performing a printing operation and a light source for a device for performing a line photometric operation separately, and a mechanism for performing each operation with each light source. Met.

In addition, as shown in FIG. 4, the photometric device (17) itself also includes the BGR scanner filters (19) (19a) (19).
b) is fixed and installed separately, and the fixed scanner filters (19), (19a) and (19b) were used for photometry. Therefore, each scanner filter (19) (19a) (19)
Photometric sensors (18), (18a), and (18b) corresponding to b)
Had to be equipped.

Therefore, two light sources are required for the exposure unit and the photometry unit,
The mechanism requires a complicated light source management function for separately confirming and measuring the fluctuations of these two light sources and correcting them, and also requires a sensor required for line photometry to be provided for each scanner filter.

(Problem to be Solved by the Invention) Due to such a configuration of the conventional scanner photometry device, the mechanism of the photometry device itself is complicated and bulky to increase the required space and cost of the entire photoprinting machine, and is different. Since this is a two-step operation by switching between two light sources, a series of operations from photometry to exposure is not smooth, and the printing efficiency has been reduced. There was such a problem.

This invention solves these problems and reduces the space and cost of color photoprinting machines by simplifying and reducing the size of the photometric device, while realizing low cost printing of color photos by improving work efficiency. Aim.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a light source unit including a halogen lamp, a cut filter, a dimming filter, an optical unit including a lens and a shutter, a printing exposure unit, and a scanner. In a line photometer of a photographic printer having a photometer including a filter, a photometer, and the like, a single light source used for exposure is provided, and the light source passes through a reflector such as a mirror tunnel and is transmitted through a film to be exposed. Utilizing a part of the optical path that passes near the mirror tunnel side wall, the entire film is transmitted, the transmitted light is extracted outside the exposure optical path, and is placed on the same surface of a rotary plate frame that is pivotally driven to rotate. After passing through each of the B, G, and R scanner filters to be mounted, the film is introduced into a single photometric sensor provided on the optical axis opposite to this. A scanner photometer for a color photographic printing machine, which detects the light component to be detected and automatically operates and operates the optical unit based on the data, and rotates by controlling the detection of the filter sensor. The light component of the film transmitted by each scanner filter on the rotating plate frame is detected and shared by one photometric sensor, and the optical unit is automatically operated.

(Function) By taking out a part of the light around the optical path that has passed through the mirror tunnel to the outside of the optical path and introducing it to the photometric sensor, setting each scanner filter parallel to the film surface and setting the photometric sensor vertically. And a highly accurate detection without distortion can be obtained. In addition, one light source is used for exposure (printing) and for detecting light components of the film to measure color balance.

In addition, since the reciprocating operation of the scanner filter in the photometric light path taken out from the exposure optical path is a rotational movement by the detection control of the filter sensor using the same optical axis, the film transmitted through each scanner filter by a single photometric sensor is Each of the light components is detected and measured, and the scanner filter moves smoothly and speedily.

(Embodiment) Next, a scanner photometer for a color photoprinter according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing the mechanism of the scanner photometer in a color photoprinter. A heat reflection filter (12), a dimming filter (13), and a cut filter (14) for moving forward and backward between a mirror tunnel (10) provided on the optical path (11) from the light source (9). A negative film (16) is arranged and supported on an optical path (11) following the mirror tunnel (10), and a photographic paper (11) is passed through a lens (not shown) provided. This is to print a film image on a surface (not shown).

The reflecting mirror (8) is used to extract a part of the light from the light source (9) that has been uniformly diffused through the mirror tunnel (10) and has passed near the wall (10a) of the mirror tunnel (10). Set up the optical path (11
A light measuring unit (1) is constructed by disposing a scanner filter (3) made of BGR and moving forward and backward on the optical axis of (a) and a light measuring sensor (2). A single light source (9) is used as a reflecting mirror. In (8), the light is taken out to the light source for exposure (9a) and the light source for photometry (9b), and the optical path (11a) from the reflecting mirror (8) is introduced into the sensor (2) and transmitted through the entire negative film (16). The light component is detected and used simultaneously to control the printing exposure condition in the optical path (11).

FIG. 2 shows an embodiment of a movable scanner filter in a scanner photometer, in which a circular rotating plate frame (4) supported by a shaft (7) to be rotationally driven by a motor (6) is provided with a B.B.
The GR filter sections (3a), (3b), and (3c) are divided into a scanner filter (3), and a part of the negative film (16) passes through the reflection mirror (8) through the scanner filter (3). The sensor (2) measures and detects the light component transmitted through the entire film through the optical path (11a), and the detection accuracy is improved by interposing a lens (15). A filter sensor (6b) for detecting the passage timing of each filter (3a) (3b) (3c) is installed around the rotation of the scanner filter (3), and the light component of each light is measured according to the timing. I do.

FIG. 3 shows another embodiment of the movable scanner filter, in which the filter portions (3a) (3b) (3
A scanner filter (3) consisting of a fan-shaped rotary plate frame (5) for partitioning c) is pivotally supported (7) and is installed to be driven intermittently by a pulse motor (6a), and a reflection mirror (8)
A photometric sensor (2) is installed on the optical axis of the optical path (11a) from the camera via a lens (15), and a filter sensor is placed on the periphery of the rotation of the fan-shaped rotary plate frame (5) of the scanner filter (3). (6b) is provided to adjust the photometric timing.

The scanner filter (3) using the rotary plate frames (4) and (5) is effective in that the photometric detection operation can be performed quickly, and the scanner filter (3) using the rotary plate frame (5) using the pulse motor (6a) is effective. In (3), the effect is remarkable.

(Effect of the Invention) The scanner photometer of the color photographic printing machine of the present invention has the above-mentioned configuration, and is provided with two dedicated light sources, a light source for printing exposure and a light source for photometry. Unlike the mechanism of the above, a part of the light from the single exposure light source is separated for photometry and led out, and each scanner filter is rotated and driven by the detection control of the filter sensor to sequentially convert the light component transmitted through the entire film. It is characterized by measuring and detecting and controlling printing exposure. Not only is it possible to reduce the size by a single light source to save space, but also to take out a part of the exposure light path from the exposure light path and separate it from the film surface. In contrast, since the scanner filter can be installed in parallel and the photometric sensor can be installed vertically, color information with high accuracy without distortion can be detected.
In addition, the fluctuation of the light source between the printing exposure and the film photometry is eliminated, so that the securing and operation of management functions for calculation and control required for measuring and correcting the fluctuation are reduced.

In addition, in a scanner photometric device characterized in that a single photometric sensor is sufficient by rotating each scanner filter mounted on a rotating plate frame that rotates, each scanner filter is sequentially placed on the same photometric line. By rotating, a single sensor that measures and detects the optical information of the film can also be used for each scanner filter. Since the forward and backward movements smoothly and quickly operate, the photometry of the light component of the film at the time of printing can be performed efficiently.

In this way, by simplifying these photometric mechanisms in the scanner photometric device, it is possible to reduce the size of the entire device and achieve significant cost reductions. It contributes greatly and has the effect of reducing the printing cost.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a scanner photometric device in a color photographic printing machine for implementing the present invention, FIG. 2 is a schematic diagram showing an embodiment of the scanner photometric device of the present invention, and FIG. 3 is also a scanner photometric device of the present invention. FIG. 4 is a schematic view showing another embodiment of the apparatus, and FIG. 4 is a schematic view showing a conventional scanner photometer. (1) Photometric section, (2) Photometric sensor (3) Scanner filter (3a) (3a) (3c) Filter section (4) (5) Rotating plate frame, (6) Motor (6a): pulse motor, (7): pivot (8): reflective mirror, (9): light source (10): mirror tunnel, (11): optical path (11a): photometry Optical path, (13) ... dimming filter (14) ... cut filter (16) ... negative film

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-3133 (JP, A) JP-A-60-104835 (JP, U) JP-A-48-32044 (JP, U)

Claims (3)

(57) [Scope of request for utility model registration] 1. A line photometer for a photographic printing machine having a light source section, an optical section, an exposure section, and a photometry section, wherein a single light source for exposure is provided, and a film is formed by utilizing a part of the light path of the light source. It sequentially transmits the whole, takes out the transmitted light out of the optical path, passes it through each scanner filter that is mounted on the same surface of the rotating plate frame that is provided with a drive device and a filter sensor and that is supported for rotational drive control, and A scanner photometric device for a color photographic printing machine, which is adapted to be introduced into a single photometric sensor provided on the optical axis opposite to the optical axis and to perform photometry. 2. A scanner photometer in a color photographic printing machine according to claim 1, wherein said scanner filter is mounted on a rotating plate frame which is rotatably supported by a motor. 3. A scanner photometer in a color photographic printing machine according to claim 1, wherein said scanner filter is mounted on a rotary plate frame which is rotatably supported by a pulse motor.