Abstract:
An electronic spectrophotometer for measuring the reflectance of colored samples relative to a reference standard. A switching mirror directs light from a monochromator on a sample and a reference standard that are spaced apart. Reflections therefrom fall on a common photoelectric detector and the resultant signals are amplified, separated and indicated as a quotient between sample and standard reflectance.
Abstract:
System for periodicially shifting a light beam between two axially displaced paths consists of a rotary assembly subdivided into at least three angularly displaced segments, one of the segments allowing the beam to pass through the assembly along one path, the other two segments comprising axially aligned radially spaced oppositely directed conically shaped reflectors arranged to axially displace the beam when it impinges on one of them.
Abstract:
A spectrometer according to this disclosure includes optical means for receiving radiation from a region which may or may not contain particular materials to be monitored. Spectrum display means is provided for displaying the spectrum of received radiation. A first output means having first apertures is disposed to pass an image of absorption lines associated with the particular material being monitored, and second output means having second apertures is disposed to pass an image of continuum associated with the particular material.
Abstract:
A spectrophotometer of the two-beam type employing two adjustable monochromators and employing a rotating chopper disc to provide time-sharing operation, such as split-beam operation, dual wavelength operation, or other desired modes of operation. The chopper disc motor is stabilized by a fiber optic feedback system and cooperating electronic system utilizing light beams reflected by the underside of the chopper disc and photo diodes responding to these reflections. The main optical system includes an adjustable lens element coupled to one of the monochromators to compensate for variations in refractive index of the lens element with wavelength. The electronic readout system is gated by the chopper disc stabilizing system to maintain synchronism of the readout signals with the two monochromatic excitation beams.
Abstract:
A SENSITIVE AND VERSATILE APPARATUS IS DESCRIBED FOR MEASURING THE OPTICAL PROPERTIES OF MATERIALS. A TRANSPARENT REFRACTING CHOPPER IS USED TO ALTERNATELY DISPLACE THE RADIATION FROM THE SOURCE INTO THE SAMPLE AND REFERENCE BEAMS. BOTH TRANSMITTANCE AND REFLECTION MEASUREMENTS CAN BE MADE USING THIS APPARATUS.
Abstract:
A spectrophotometer uses a single beam of light into which the sample cell and reference cell are alternately rotated. The radiation-sensing circuit includes means to automatically compensate to read 100 percent transmission.
Abstract:
THERE IS DISCLOSED A CIRCUIT IN A RADIANT ENERGY ANALYZER FOR OFFSETTING AND SCALING THE RATIO OF TWO SIGNALS. THE CIRCUIT IN PART COMPRISES A FIRST CHANNEL AND A SECOND CHANNEL AMPLIFYING DEVICE. A FIRST SIGNAL IS CONNECTED TO THE FIRST CHANNEL AMPLIFYING DEVICE THE OUTPUT OF WHICH IS CONNECTED TO A FIRST VOLTAGE DIVIDER COMPONENT. A SECOND SIGNAL IS CONNECTED TO THE SECOND CHANNEL AMPLIFYING DEVICE THE OUTPUT OF WHICH IS CONNECTED TO A SECOND VOLTAGE DIVIDER COMPONENT. THE SECOND DIVIDER IS CONNECTED TO THE SECOND CHANNEL AMPLIFYING DEVICE SO AS TO PROVIDE A PORTION OF THE SECOND CHANNEL AMPLIFYING DEVICE SIGNAL OUTPUT AS DEGENERATIVE FEEDBACK. THE FIRST DIVIDER IS CONNECTED TO THE SECOND CHANNEL AMPLIFYING DEVICE SO AS TO PROVIDE A PORTION OF THE FIRST CHANNEL AMPLIFYING DEVICE OUTPUT SIGNAL IN SERIES WITH THE SECOND CHANNEL AMPLIFYING DEVICE FEEDBACK. THE RATIO OF THE SECOND SIGNAL TO THE FIRST SIGNAL AT THE OUTPUT OF THE AMPLIFYING DEVICES IS EQUAL TO A SCALE FACTOR TIMES THE DIFFERENCE BETWEEN THE INPUT SIGNAL RATIO AND AN OFFSET TERM WHERE THE OFFSET IS DETERMINED BY THE FIRST DIVIDER AND THE SCALE FACTOR BY THE SECOND DIVIDER.
Abstract:
A spectroscopic measurement device emits light to a measurement target and measures the measurement light output from the measurement target in accordance with the light emission. A spectroscopic measurement device includes: a first housing having a light shielding property and configured to house a light source that emits light and having a first opening through which the light emitted from the light source passes; a second housing having a light shielding property and having a second opening through which the measurement light passes and configured to house a spectrometer that receives the measurement light that has passed through the second opening; and an arm member configured to relatively rotatably join the first housing and the second housing. A proximal end side of the arm member is rotatably joined with the second housing. The first housing is attached to a distal end side of the arm member.