摘要:
The present invention provides a PWM control apparatus which makes it possible to obtain a high-precision, high-S/N-ratio, low-cost, small-volume, light-weight motor driving apparatus. In particular, to provide a motor driving apparatus using this PWM control apparatus, a stage apparatus using this motor driving apparatus, an exposure apparatus using this stage apparatus, a device manufactured by means of the exposure apparatus, and a device manufacturing method.
摘要:
Polarization analyser device comprises a light source, a condenser lens for forming the light from said source into a parallel light beam, a monochrome filter for forming the light from said lens into a predetermined wavelength of light, a polarizer disposed with azimuth at 0*, a half mirror disposed between said polarizer and said filter, a condenser lens and a light receiving element both disposed in the light reflecting direction of the half mirror, two light modulators disposed in the light transmitting direction of said half mirror with azimuth at 45*, two 1/4 wavelength plate disposed with azimuth at 0* and 45*, respectively, a 1/2 wavelength plate disposed rotatably about the optical axis and a reflecting mirror disposed perpendicularly to the optical axis. The device further comprises a synchronous rectifying circuit for dividing the light modulated by said two modulator into the signal of phase difference of and the signal of azimuth of a sample. A servo motor of which input is signal of the phase difference of outputs from the synchronous rectifying circuit, is associated with said 1/2 wavelength plate. A display circuit is provided for displaying an amount of rotation of the servo motor. A further display circuit is provided for displaying the phase difference of the sample.
摘要:
In a compact motion picture projector, a film frame feed device includes a film feed pawl, drive means for the feed pawl, changeover means having an operating member and operable by the operating member to change over the film feed speed of the drive means between a first, a second and a third condition, and means for restraining the change-over means in each of the three conditions. The change-over means is further capable of changing over the film feed pawl drive means to a fourth condition which is discrete from but functionally identical with the second condition. The feed device is further provided with means to bias the change-over means from the fourth condition to the third condition.
摘要:
A photoelectric detector device for determining whether or not a body formed with a linear mark lies within a given range comprises an image-forming optical system for forming the image of the linear mark, two slit plates disposed adjacent the focal plane of the optical system and a corresponding number of photoelectric converter means for converting into electrical signals light beams passed through the slits in the plates. The slits each formed in the plates are parallel to the linear mark and correspond in position to the opposite ends of the range. Oscillating means are provided for causing the image-forming light beam passing through the optical system and the plates to be oscillated relative to each other at a predetermined frequency so as to scan the image of the linear mark within a range containing at least the slits. A processing circuit for taking the difference between the output signals from the two photoelectric converters derives from such difference signal a frequency component equal to the oscillation frequency of the oscillating means, thus providing either a positive or a negative signal indicating the position of the linear mark.
摘要:
Timers for controlling load circuits, such as motors in motordriven cameras, have ON and OFF intervals which can either be continuously repeated or automatically interrupted after various selected sequences of ON-OFF operations for thereafter holding the load circuit in an energized or de-energized state. The timers comprise a bi-stable circuit having complementary output signals and a pair of CR time-delay circuits for generating timedelayed signals in response to the output signals, the timedelayed signals being coupled to respective inputs of the bistable circuit for causing the bi-stable circuit to be alternately set in first and second states. A load responsive to one of the output signals is energized or de-energized in accordance with the state of the bi-stable circuit. An interrupter circuit responsive to one of the time-delayed signals causes the load to be continuously energized or de-energized after a selected ON-OFF sequence.
摘要:
A device for preventing the oscillation of an LRC circuit of an electronic shutter control circuit includes a control circuit and a converter. A low-pass filter is interconnected between a terminal of the control circuit, from which is derived a voltage for setting an exposure, and a terminal of the LRC circuit, thereby effecting the positive feedback of the oscillation signal of the LRC circuit. The low-pass filter includes resistors and a diode connected in series and a capacitor, one terminal of which is connected to the juncture of the resistors.
摘要:
An ellipsometer includes a polarizing optical system, a first and a second optical path changing total reflecting prism, and an analyzer. Light from a light source passes through the polarizing optical system to leave it in the form of elliptical polarized light, which in turn passes through the first total reflection prism in which the elliptical polarized light is given a phase skip difference and deflected so as to impinge on the surface of a sample obliquely with respect thereto. The light so reflected by the first total reflection prism further passes through the second total reflection prism in which the light is given a phase skip difference and deflected in a direction substantially parallel to the optical axis of the polarizing optical system. The light passed through the second total reflection prism is finally extinguished by the analyzer.
摘要:
For use in an optical instrument having two objective optical axes the spacing between which is variable, a magnification varying device includes a pair of members for changing the spacing between the two objective optical axes. A pair of magnification varying members are rotatably mounted on the spacing changing members by means of rotary shafts for successively moving lenses of any desired magnifications into alignment with the two optical axes. A pair of supporting members, each having at least one articulation, are provided so that one end of each of the supporting members are pivotally connected to the rotary shaft of each of the magnification varying members and that the other ends of the supporting members are pivotally connected to an operating member which is rotatably mounted to the body of the device. A pair of rotation transmitting members are supported by the supporting members to transmit rotation of the operating member to the respective magnification varying members.
摘要:
A CAMERA HAVING A TAKING LENS WITH AN ADJUSTABLE APERTURE, SHUTTER MEANS MOUNTED FOR MOVEMENT FROM AN INITIAL POSITION TO A TERMINAL POSITION, AND CONSTRUCTED AND ARRANGED THAT THE TIME PERIOD BETWEEN INITIATION AND TERMINATION OF MOVEMENT IS DETERMINATIVE OF THE EXPOSURE TIME OF SAID CAMERA, AND AN AUTOMATIC EXPOSURE SYSTEM INCLUDING PHOTOSENSITIVE MEANS RESPONSIVE TO THE LIGHT WHICH IS PASSED THROUGH THE TAKING LENS FOR PROVIDING A FIRST ELECTRIC SIGNAL RELATING TO THE BRIGHTNESS OF THE LIGHT, MEMORY MEANS COUPLED TO THE PHOTOSENSITIVE MEANS FOR MEMORIZING THE VALUE OF THE BRIGHTNESS OF THE LIGHT PASSED THROUGH THE TAKING LENS AFTER ADJUSTMENT OF THE APERTURE, SELECTIVELY ACTUABLE CONTROL MEANS FOR ADJUSTING THE SIZE OF SAID APERTURE IN RESPONSE TO THE FIRST ELECTRIC SIGNAL AND A PREDETERMINED EXPOSURE TIME OF THE CAMERA, SELECTIVELY ACTUABLE EXPOSURE MEANS FOR ADJUSTING THE EXPOSURE TIME OF SAID SHUTTER MEANS IN RESPONSE TO THE VALUE OF LIGHT MEMORIZED BY THE MEMORY MEANS, AND SWITCH MEANS FOR SELECTIVELY ACTUATING EITHER SAID CONTROL MEANS FOR ADJUSTING THE SIZE OF SAID APERATURE OR SAID CONTROL MEANS FOR ADJUSTING THE EXPOSURE TIME OF SAID SHUTTER MEANS.
摘要:
An exposure meter comprises exposure detecting means connected with an electric power source and including a photoelectric element, means connected with the photoelectric element to introduce exposure influencing factors thereinto, and means connected with the photoelectric element and with the introducing means to produce a proper exposure signal. Indicating means is connected with the exposure detecting means and operable to indicate a proper exposure in response to the proper exposure signal. Means is connected between the exposure detecting means and the indicating means to render the indicating means inoperable for any voltage drop of the source voltage below the minimum usable voltage.