JPH01102536A - Zoom variable power control method in microreader/ printer - Google Patents

Abstract

PURPOSE:To improve the operability at the time of copying and setting a projecting magnification by controlling two zoom lens whose one is used for controlling continuously variable power and the other is used the variable power at every arbitrary step. CONSTITUTION:The titled microreader/printer has two modes of a normal mode (mold 1) for executing continuously variable power and a step mode (mode 2) for executing the variable power at every plural magnifications which have been set in advance. Switching of said two modes is executed by a mode changeover switch 2, and the mode at that time is displayed by a mode display LED 3. In this regard, the mode changeover switch 2 is switched alternately to both the normal and the step modes whenever it is depressed once. In such a way, in the normal mode, magnification fitted with its film can be set, and also, in the step mode, it is also possible to set quickly to an arbitrary prescribed magnification.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a method for controlling magnification of a microreader printer having a magnification changing mechanism using a zoom lens.

[Prior Art] In a microreader printer having a conventional zoom lens magnification mechanism, the magnification changing method is only a method of continuously changing the magnification, or a method of changing the magnification only at fixed steps. However, with the former, the magnification once set is not fixed, so you have to set the magnification each time, and with the latter, detailed magnification settings cannot be made.
There was a drawback that it was not possible to deal with the reduction ratio error of each microfilm.

[Objective] An object of the present invention is to enable two types of zoom lens control: continuous zoom control and arbitrary step-by-step zoom control in a microreader printer having a zoom lens-based zoom mechanism. , to improve operability when setting copying and projection magnification.

[Structure] The zoom magnification control method for a microreader printer of the present invention was developed to achieve the above-mentioned object, and is capable of controlling copying and projection magnification in a microreader printer having a magnification change mechanism using a zoom lens. Continuous variable magnification control system that continuously controls the magnification of the zoom lens according to the operation of the zoom, enlargement, and reduction switches, and selects the appropriate magnification from multiple step magnifications set in advance according to the operation of the enlargement and reduction switches. The present invention is characterized in that it is possible to arbitrarily select and switch between a step magnification control system that controls the magnification of the zoom lens to a selected appropriate magnification in response to the operation of a start switch.

The present invention will be specifically described below based on one embodiment.

FIG. 1 is an example of the operation panel of a microreader printer equipped with a magnification setting device of the zoom magnification control method of the present invention.
Magnification display section 1 consisting of a 7-segment LED (light emitting diode) in the center of the panel, and mode selection switch 2 around it.
, a mode display LED 3, an enlargement switch 4, a reduction switch 5, a step mode magnification change start switch 6, and a step mode magnification change stop switch 7 are provided, respectively.

Generally, in a standby state after power is turned on, an image is projected on the screen, the current magnification is displayed on the magnification display section 1, and copying can be performed at that magnification.

The operating procedure when changing the magnification according to the present invention is as shown in the flowchart shown in FIG. That is, the microreader printer based on the present invention has two modes: a normal mode (mode 1) in which the magnification is changed continuously and a step mode (mode 2) in which the magnification is changed at each of a plurality of preset magnifications. . Switching between the two modes is performed by the mode changeover switch 2 shown in FIG. 1, and the mode at that time is displayed by the mode display LED 3.

It should be noted that each time the mode selector switch 2 is pressed, it is alternately switched between the normal mode and the step mode.

Next, magnification change in normal mode is performed by the enlargement switch 4 and reduction switch 5.The method is such that the zoom lens moves only while the enlargement switch or reduction switch is pressed, and when the switch is released, the zoom lens moves. is now stopped.

On the other hand, in step mode, the enlargement switch 4 and reduction switch 5 are used to set the appropriate magnification desired for copying and projection.At this time, each time the enlargement switch or reduction switch is pressed, the display magnification is set in advance. It changes in order according to the step magnification. The zoom lens does not move when selecting the magnification, but after selection, the zoom lens moves by pressing the variable magnification start switch 6.
The magnification is changed to the selected magnification. Note that 7 is a step mode magnification change stop switch that can be used to stop the magnification change midway after the magnification change is started by the switch 6. Furthermore, FIG. 3 is a circuit diagram showing an example of a circuit configuration for performing the above control, in which 8 is a stepping motor for driving zoom lens magnification, 9 is an encoder for zoom lens magnification signal, and 10 is a zoom lens reference setting. It is a switch for If the circuit configuration shown in Fig. 3 is adopted, the magnification of each step can be arbitrarily set by operating the zoom lens reference setting switch 1O, and the magnification can be changed for a certain period of time or more during continuous zooming. You can also make the speed of magnification increase by holding down the magnification switch, and when changing from continuous magnification to step magnification, the magnification will automatically change to the closest of several preset step magnifications. It is also possible to change the magnification to .

[Effects] The zoom magnification control method of the present invention is configured as described above, and has a continuous magnification control system in normal mode and a step magnification control system in step mode for zoom magnification. In normal mode, you can set the magnification that suits the film, and in step mode, you can quickly set any fixed magnification.

Therefore, according to the present invention, it is possible to freely and quickly select and carry out detailed magnification settings that match the shrinkage ratio of each film and quick settings to any predetermined magnification depending on the application. Can be done.

[Brief explanation of the drawing]

FIG. 1 is a front view of the operation panel of a Microleague printer equipped with a magnification setting device of the zoom magnification control method of the present invention;
FIG. 2 is a flowchart showing the operation means for changing the magnification of the present invention, and FIG. 3 is a circuit diagram for controlling the embodiment shown in the flowchart. 1...Magnification display section, 2...Mode cut-off switch, 3...Mode display and ED, 4...Enlargement switch, 5...Reduction switch, 6... Step mode variable power start switch, 7...Step mode variable magnification stop switch.

Claims (1)

[Claims] In a microreader printer that has a variable magnification mechanism using a zoom lens, when setting the copying and projection magnification,
A continuous magnification control system that continuously controls the magnification of the zoom lens according to the reduction switch operation, and a start switch that selects the appropriate magnification from multiple step magnifications set in advance according to the enlargement and reduction switch operations. A zoom magnification control method for a microreader printer, characterized in that a step magnification control system for controlling a zoom lens to a selected appropriate magnification according to an operation can be arbitrarily selected and switched.