JPH0334781A - Television lens with macro mechanism - Google Patents

Abstract

PURPOSE:To easily switch a television lens from a normal use into a macro use by providing an equipment controlling a macro lens from the outside of the television lens. CONSTITUTION:A positive (+) input of a focus motor amplifier 12 at the side of a television lens section 9 is connected to a changeover lever terminal C of a 1st switch section 14a of a macro controller 10 and a +V1 voltage equivalent to a minimum image pickup distance(MOD) of a television lens at the normal use is applied to a switching terminal A. A wiper of a potentiometer 16 in a focus controller 11 is connected to a switching terminal B. Moreover, a positive (+) input of a macro motor amplifier 13 at the television lens section 9 side is connected to a switching lever terminal F of the 2nd switching section 14b. An optional image pickup distance from the MOD till 0m is obtained by turning the wiper of the potentiometer 15 of the macro controller 10.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a television lens with a macro mechanism.

(Prior art) Conventionally, to operate the macro mechanism of a TV lens, there is a lever for macro at the rear of the TV lens, and this lever is moved by moving.Also, when using the macro mechanism, the zoom effect can be increased. It is better to keep the focus close to the camera, so photographers use a focus controller to bring the focus close to the camera for macro photography.

Further, in a television zoom lens, the amount of movement of the macro mechanism usually changes depending on the zoom position. Therefore, when deciding on a photographic composition, the photographer repeatedly operates both the zoom control unit in his hand and the macro lever at the rear of the lens several times to make the desired adjustments.

(Problem to be solved by the invention) For this reason, in the past, it took a lot of time to transition from normal shooting to macro shooting when producing programs in a studio, such as cooking shows. Matching them was a very troublesome task, and there were problems with operability.

The present invention aims to improve the operability of this macro mechanism.

(Means for Solving the Problems) The present invention provides a drive unit that drives a macro lens, a detection unit that detects the moving position of the macro lens, and a device that controls the macro lens from outside the television lens. The subject matter is a television lens with a macro mechanism that is characterized by the following features:

The present invention also provides a drive unit that drives a macro lens, a detection unit that detects the movement position of the macro lens, a drive unit that drives a focus lens () focusing lens, and a detection unit that detects the movement position of the focus lens. The object of the present invention is to provide a television lens with a macro mechanism, which is characterized by having a macro lens and a device for controlling a macro lens and a focus lens from the outside of the television lens.

(Function) That is, the television lens with a macro mechanism of the present invention drives the macro lens (for example, a relay lens group) or the macro lens and the focus lens of the television lens with a drive unit (motor), and the macro lens or the macro lens and the focus lens A detection unit (for example, a potentiometer) detects the position of the lens, and a control device (controller) outside the television lens controls the macro lens or the macro lens and the focus lens. The control device is placed outside the television lens and close to the cameraman.

Therefore, the cameraman who operates the TV lens can easily use the TV lens normally (normal shooting) by simply switching the switch on the control device (macro controller) at hand, without having to operate the macro lever on the rear of the TV lens.
You can switch to macro use (macro photography) from
Furthermore, when using the macro, the focus lens can be moved close using the servo to increase the zoom effect, which is very convenient for program production and improves the operability of the macro mechanism.

(Embodiment) The drawings show an embodiment of a television lens with a macro mechanism according to the present invention. FIG. 1 is a schematic configuration diagram of a lens section of a television camera, and FIG. 2 is a block circuit diagram of a control system.

In Army Figure 1, 9 is the lens part of the television camera,
Focus lenses (
Contains variator lens (group) 2, convecator lens (group) 3, and relay lens (group) 4.

The focus lens 1 is driven to move in the nine-fold direction by a drive mechanism (not shown) that uses a motor 5 (focus motor) as a drive source. Reference numeral 6 denotes a position sensor serving as a detection unit for detecting the moving position of the focusless 1, and in this embodiment, it is a potentiometer.

In this embodiment, the relay lens 4 is used as a macro lens, and its movement in the optical axis direction is controlled by a drive mechanism (not shown) using a motor 7 (macro motor) as a drive source. Reference numeral 8 denotes a position sensor serving as a detection unit for detecting the moving position of this relay lens 4, and in this embodiment, it is a potentiometer.

In the circuit diagram of FIG. 2, 9 is a television lens section, 10 is a macro controller section (macro lens control device), and 11 is a TV lens section.
is a focus controller section (focus lens control device). The macro controller 10 and the focus controller 11 are disposed outside the television lens section 9 at the hand of a cameraman who operates the television lens.

In the circuit on the TV lens unit 9 side, 12 is an amplifier that drives the focus motor 5, and its negative (
-) The wiper of the potentiometer 6 for detecting the position of the focus lens 1 is connected to the human power.

Reference numeral 13 denotes an amplifier for driving the macro motor 7, and a wiper of a potentiometer 8 for detecting the position of the relay lens 4 as a macro lens is connected to its negative (-) human power.

In the macrocontroller 10, 14 is a two-circuit switch; +11 switch il'+14
Connect the switching lever of H to the terminal C of the television lens section 9 (!
The positive (+) power of the P+ focus motor amplifier 12 is connected. Switching terminal A indicates the minimum shooting distance with the normally used TV lens II! [+V equivalent to (MOD)
1 voltage is applied tJo L/. Switching terminal B is connected to the potentiometer 16 in the terminal B.
connected to the wiper. In addition, the switching lever vi of the second switch section 14b is
The plus (+) of the macro motor amplifier 13 of the 1z Hi'vns section 9 is connected to the manual power. The switching terminal is connected to the wiper of the bottom control meter 15 for controlling the relay lens. The switching terminal VR main voltage is applied to E, which corresponds to the normal beam position without using the macro machine 11H.

By operating the switch of the macro controller 10, the switching lever of the first switch section 14a of the two-circuit switch 14 is connected to A-C, and the switching lever of the second switch section 14b is connected to D-F. , the switching lever of the first switch section 14a is connected B-C, and the switching lever of the first switch section 14b is connected
The switching lever is selectively switched between the E and F connected states.

The former A-C and D-F connection switching state is a state where macro control is being performed, and the position of the focus lens 1 is determined by the constant control pressure +V1 applied to the switching terminal A in the macro controller 10. ) 4-Cass motor amplification oak 12
It is maintained at close range (MOD) by the positive (+) human power. The relay lens 4 as a macro lens is connected to the potentiometer 1 of the macro controller 10.
The wiper movement operation (i7
The voltage corresponding to the position is the plus (
+) It is input manually and the movement is controlled according to the input terminal value to obtain an arbitrary shooting distance from MOD to Om.

When the latter B-C and D-F connections are switched, this is the normal use of the television lens, and by operating the wiper of the potentiometer 16 of the focus controller 11, the voltage corresponding to the wiper movement position is applied to the focus motor. The positive (+) human power of the amplifier 12 is applied manually, and the focus lens 1 is controlled to move over an arbitrary photographing distance from MOD to ω length in accordance with the input terminal value. At this time, the relay lens 4 is controlled to move so that it is input to the positive (+) human power of the vR lightning voltage macromotor amplifier 13 applied to the switching terminal E of the macrocontroller 10 and is placed in the position that is the normal usage of the TV lens. be done.

(Effect of the invention) As described above, the TV lens can be easily switched from normal use to macro use by simply operating the switch on the control device outside the TV lens, and the cameraman who operates the TV lens can easily switch the TV lens from normal use to macro use by simply operating the switch on the control device outside the TV lens. The camera operator can easily use the control device at hand without having to operate the camera lever.
Macro control can be performed quickly, ease of use is achieved, and the operability of the macro mechanism is improved.

[Brief explanation of drawings]

The drawings show one embodiment, and FIG. 1 is a schematic diagram of the lens section of a television camera, and FIG. 2 is a block circuit diagram of the 1-'' system. 1 is a focus lens, 2 is a variator lens, 3 is a convexator lens, 4 is a relay lens, 5 is a focus motor, 7 is a macro motor, 6, 8, and 15 are potentiometers, 1o is a macro controller, and 11 is a focus controller.

Claims (2)

[Claims] (1) A television lens with a macro mechanism, comprising: a drive section that drives the macro lens; a detection section that detects the movement position of the macro lens; and a device that controls the macro lens from outside the television lens. (2) A drive unit that drives the macro lens, a detection unit that detects the movement position of the macro lens, a drive unit that drives the focus lens, a detection unit that detects the movement position of the focus lens, and the macro lens and the focus lens. A television lens with a macro mechanism, characterized in that it has a device for controlling the television lens from the outside.