Abstract:
A depolarizer includes a second birefringent plate having a thickness which continuously changes in a direction of an optical axis of the second birefringent plate; and a third birefringent plate having a thickness which continuously changes in a direction of 45 degree with respect to an optical axis of the third birefringent plate; wherein the second birefringent plate is stuck on the third birefringent plate so that a reduction direction of the thickness of the second birefringent plate and a reduction direction of the thickness of the third birefringent plate are opposite to each other.
Abstract:
A spectroscope includes a diffraction grating having a plurality of ruled parallel lines; and a plurality of spectroscopic paths, each of which has a collimator for collimating incident light, emits the collimated light to the diffraction grating, and emits return light, which returns from the diffraction grating, through a slit provided on the path. In the spectroscope, measured light is emitted through the plurality of spectroscopic paths so as to extract light which is included in the measured light and has a predetermined wavelength; and the collimators of the spectroscopic paths are arranged so that irradiation areas of light emitted from the collimators are offset from each other at least in a direction along the ruled parallel lines. The collimators of the spectroscopic paths may be arranged so that incident angles of light emitted from the collimators coincide with each other.
Abstract:
An improvement is added to a spectroscope for performing wavelength dispersion of measured light with a wavelength dispersion element and receiving the light at a light reception element. The spectroscope has a first compound lens made up of a plurality of lenses for converting measured light into parallel light and emitting the parallel light to the wavelength dispersion element; a second compound lens made up of a plurality of lenses for gathering the measured light subjected to the wavelength dispersion in the wavelength dispersion element and causing the light reception element to receive the light; and a base for fixing the wavelength dispersion element, the first compound lens, and the second compound lens. The linear expansion coefficient of the compound focal length of the first compound lens, the linear expansion coefficient of the compound focal length of the second compound lens, and the linear expansion coefficient of a material forming the base are substantially equal.
Abstract:
A spectroscope includes a diffraction grating having a plurality of ruled parallel lines; and a plurality of spectroscopic paths, each of which has a collimator for collimating incident light, emits the collimated light to the diffraction grating, and emits return light, which returns from the diffraction grating, through a slit provided on the path. In the spectroscope, measured light is emitted through the plurality of spectroscopic paths so as to extract light which is included in the measured light and has a predetermined wavelength; and the collimators of the spectroscopic paths are arranged so that irradiation areas of light emitted from the collimators are offset from each other at least in a direction along the ruled parallel lines. The collimators of the spectroscopic paths may be arranged so that incident angles of light emitted from the collimators coincide with each other.
Abstract:
A monochromator including: a concave mirror which converts incident light into parallel light and emits the parallel light, a plane diffraction grating for diffracting the parallel light emitted from the concave mirror, first reflection means which reflects first light diffracted by the plane diffraction grating and causes the diffracted light to enter the plane diffraction grating as second incident light, second reflection means which reflects second diffracted light and causes the reflected light to enter the plane diffraction grating as third incident light, and an exit slit disposed in the vicinity of a focal point such that third diffracted light is reflected by the first reflection means, to thereby enter the plane diffraction grating as fourth incident light and such that fourth diffracted light is converged at the focal point by the concave mirror, to thereby enable extraction of light having a specific wavelength.
Abstract:
A depolarizing plate comprising a first rectangular wedge plate that has a first crystallographic optical axis in a diagonal direction of the rectangle and which has a thickness thereof in a vertical direction vary continuously in a direction 45 degrees from said first crystallographic optical axis and a second rectangular wedge plate that has a second crystallographic optical axis in a diagonal direction of the rectangle crossing said first crystallographic optical axis at right angles and which has a thickness thereof in a vertical direction vary continuously in a direction 45 degrees from said second crystallographic optical axis, the two wedge plates being joined in such a position that said first crystallographic optical axis crosses said second crystallographic optical axis at right angles, wherein the slope formed by the joint of said wedge plates is rotated about the optical axis of an incident ray of light.
Abstract:
Apparatuses and methods for managing a process that include schedule management, quality, and process management features. Information is stored on an authorized person in charge and a conformity standard for the work to be managed. From this information, a managing method of the work to be managed from among a plurality of managing methods classified in advance is determined. Processes are determined for each management method, and a time limit determined by the authorized person in charge for each managed process. Adherence standards related to the managed processes are included, as well as records made of the process information including the performance quality of the managed process.
Abstract:
In a four-stage type monochromator, there is provided a returning reflector 6 for making the dispersing direction of the wavelength of light 13e and 13h incident on and emergent from a plane diffraction grating 4 is reversed before and after its reflection. Angles of incident and emergent light at a time when the light is spectrally separated by the diffraction grating 4 are made identical.
Abstract:
This invention provides a pressure control valve 20 including a valve plug 30 facing a seat As at a relief port A that communicates with a pressure circuit 46, and a spring 32 pressing the valve plug 30 against the seat, and when the fluid pressure in the pressure circuit surpasses the force of the spring 32 for the valve plug, the pressure control valve discharges part of the fluid to keep the interior of the pressure circuit at a specified setting pressure. In the pressure control valve, at one end of the spring for the valve plug which is remote from the valve plug there is provided a pilot piston 40 freely movable in the expansion and compression direction of the spring for the valve plug. There is also provided a spring for adjustment 38c urging the pilot piston 40 toward the valve plug side. The pilot piston 40 is so structured as to move in a direction of going away from the valve plug when supplied with a pilot fluid under a specified pressure Ppi.
Abstract:
A pressure control valve automatically controllable of a set value of a pressure circuit by pilot operation without using an electrical signal, is provided. A pressure control valve include a valve body (30) opposing to a seat surface of a relief port (A) connected to a pressure circuit (46) and a spring (32) biasing the valve body (30) onto the seat surface, for flowing out a part of the fluid within the pressure circuit (46) to hold the fluid pressure in the pressure circuit (46) at a predetermined set pressure when the fluid pressure in the pressure circuit (46) is higher than or equal to the set pressure. A pilot piston (40) is arranged movably in expansion and contraction direction of the spring (32) at an end portion of the spring (32) remote from the valve body (30), the pilot piston (40) moves in a direction for compressing the spring (32) when a predetermined pressure of a pilot fluid is input. A spring force of the spring (32) is increased and decreased by varying compression force of the spring (32) by moving the pilot piston (40) depending upon increasing and decreasing of the pressure of the pilot fluid.