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4239391 |
Modular motorized polarizers for a spectrofluorometer
The input polarizer and the output polarizer of a spectrofluorometer are each mechanically identical except for the optical elements, and are constructed as modules which plug into a...
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4202601 |
Training aid for use with night vision apparatus
A filter arrangement is described which is incorporated with a night vision device. The filter arrangement consists of a variable density polaroid filter array and a blue-green filter all contained...
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4153952 |
Polarized face shield
A variable density polarizing attachment for shields combined with spectacles having polarizing lenses is provided along with a method of making variable density shields. A polarizing rotary disc...
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4151411 |
Laser safety goggles
An automatic adjustable radiant energy filter system adapted for protecting uman eyes (and other optical devices) from dangerous intensities of laser light or other types of radiation during...
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4149780 |
Variable density sunglasses comprising light polarizing elements
Variable density spectacles comprising a pair of superposed iodine stained light polarizing elements, one of such elements being rotatable through an arc of less than 90 degrees to provide changes...
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4099858 |
Variable light transmission ophthalmic device
An ophthalmic device comprising superposed pairs of light polarizing elements, one pair of such elements being fixed and the other pair being rotatable with respect to the fixed pair to provide a...
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4070096 |
Polarized cosmetic mirror
A casing structure supports a circular mirror having a flat polarized surface and an annular window surrounding the circular mirror. A single light source in the casing has its light directed to an...
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4003663 |
Device for calibrating instrument that measures circular dichroism or circularly polarized luminescence
A device for calibrating an instrument that measures circular dichroism has a transparent dielectric plate rotatably mounted in a framework so as to be rotatable about an axis passing through the...
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3990087 |
3-Dimensional camera
This invention relates to a reflex camera device having a single lens for the photography of right and left images from an object space transmitted as first and second light ray bundles from two...
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3944346 |
Polarizing spectacles
Spectacles having a face-formed readily separable two-section eyeglass frame front wherein a first forward section of the frame front supports a pair of fixed non-circular light-polarizing lenses...
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3941476 |
Focus system
A system for visually determining the distance to an object includes a lens that is adapted to be sighted upon an object, said lens being divided equally in a first direction with each half covered...
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3932039 |
Pulsed polarization device for measuring angle of rotation
An electro-optical system is disclosed for measuring rotational angle. The system includes a radiation source and reference linear polarizer in combination with a plurality of linear target...
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3897136 |
Polarization-grating moire
The present invention relates to the formation of moire patterns. At least two grating structures with periodic variation of polarization are superpositioned in a defined optical path to produce...
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3880496 |
Attachable polarized inner window for conveyances
A frame member has a rearwardly extending peripheral flange adapted to be inserted into a window recess. A polarizer is rotatably mounted on the frame member forwardly of the flange and a mask is...
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3874163 |
Liquid crystal display timepiece with variable contrast
Variable contrast in a watch using a liquid crystal display panel for showing the time is achieved by the use of polarizer sheets proximate both surfaces of said panel. The outer of said sheets is...
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3840731 |
FOG LIGHT FOR MOTOR VEHICLES
An installation for the better recognition under foggy weather conditions of objects in the light of motor vehicle fog lights, in which the fog lights radiate polarized light and an analyzer is...
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3810689 |
DEVICE FOR VARYING LIGHT TRANSMISSION EMPLOYING ROLLER-CABLE MECHANISM
A control device comprising a roller-cable and guiding assembly which minimizes friction. The device includes a pair of rollers mounted in a roller cluster, displaceable along a cable within a...
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3807072 |
ANIMATED DISPLAY
An animated display assembly for an advertising sign or decorative display. A plurality of overlapping, axially separated polarizing disks are rotatably mounted between a stationary display panel...
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3804522 |
SYSTEM FOR REMOTE READING THE ANGULAR POSITION OF A SURFACE BY DETECTING POLARIZED LIGHT REFLECTED THEREFROM
An instrument has on its face a retroreflector surface and in front of that a light polarizer which is mounted on the instrument output shaft, so that when the face of the instrument is viewed from...
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3798618 |
HOLOGRAPHY MEMORY APPARATUS USING A SINGLE QUARTER-WAVE SPACIAL MODULATOR
A holography memory apparatus has an object light beam converted into circularly polarized light by a quarter-wave plate. The circularly polarized light beam is caused to impinge upon a digital...
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3787991 |
AUTOMATED ANIMATED DISPLAY DEVICE
A device for displaying and animating a plurality of transparencies in succession. A cabinet is provided with a polarizing light projection means located in its central section and an endless...
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3786571 |
AUDIO COMPASS
The audio compass includes a first polarized transparent sheet affixed to a magnetic needle of a magnetic compass, and second and third polarized transparent sheets affixed to a graduated compass...
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3782104 |
TIMER HAVING A COLOR-DISPLAY SYSTEM
A color-display system embodied in a clock mechanism wherein the face of the clock constantly changes color. A pair of transparent, light-polarizing sheets are arranged parallel to one another with...
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3779650 |
PORTABLE SMOKE MEASURING DEVICE
A portable device for visual measurement of smoke density of opacity that includes first and second discs that are support in overlapping relation for rotation relative to each other. Each disc has...
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3774986 |
RECORDING SUPERIMPOSED HOLOGRAMS
Where superimposed holograms are produced on the same photosensitive element by recording the interferences of two coherent beams comprising a reference beam and an object beam with each reference...
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3743381 |
ARRANGEMENT FOR EFFECTING ROTATIONAL MOTION BETWEEN POLARIZING ELEMENTS
A control device comprising a roller-band and guiding assembly which minimizes friction, in conjunction with tackle means and fixed and rotatable light polarizers in a compact housing to effect a...
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3741661 |
UNIVERSAL POLARIMETER
A polarimeter is constructed to measure the two variables of polarization (angle of elliptical orientation and phase difference) of a polarized light beam after transmitting through a specimen...
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3732793 |
CALIBRATED VARIABLE NEUTRAL DENSITY FILTER FOR A CAMERA
A calibrated neutral density filter has two polarizing filter members mounted in filter ring supports for rotation relative to one another. Indicia on the filter supports relate the degree of...
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3711182 |
GLARELESS MIRROR USING RELATIVELY ROTATABLE POLARIZERS
A mirror having a polarized surface cooperates with a light source for illuminating a subject in front of the mirror. A polarized window in front of the light source is provided so that the...
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3676845 |
TURN SIGNAL INDICATING SYSTEM
A turn signal indicating system for a vehicle wherein a rotary and a stationary polarized sheet are mounted with respect to an end of a vehicle, along with a light source. A light intercepting...
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3674906 |
EDUCATION DEVICE EMPLOYING POLARIZED PLASTIC MATERIAL
A method and apparatus are disclosed for transmitting information from a first person to a second person while precluding transmission of the information to other persons. A first polarizing area...
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3655268 |
LASER BEAM ATTENUATOR
This attenuator comprises a pair of axially aligned anti-parallel Brewster angle windows that are rigidly secured in a cylindrical adjustment tube that is rotatably secured in a mounting tube. The...
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3647278 |
LIGHT-TRANSMITTING ELEMENTS
A composite structure comprising a high-order wave plate and a light-polarizing element utilized in a light-transmitting window apparatus comprising a stressed plastic material to eliminate...
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3601469 |
ROTARY POLARIZER
A rotary polarizer for use with animated display devices, wherein only a percentage of the polarizer is polarized. Therefore, part of the light passing through the polarizer is polarized and the...
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3554105 |
METHOD AND APPARATUS FOR ORIENTING A POLARIZING FILTER
A system for use with a camera or other optical device, to obtain optimum filtering of light polarized by atmospheric scattering or by specular reflections, includes a polarimeter which supplies an...
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3549259 |
POLARISCOPE
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3538322 |
POLARIZED LIGHT DISPLAY
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3521940 |
ADJUSTABLE ATTENUATION LASER SAFETY WINDOW
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3521300 |
AUTOMATIC ELECTRIC SELF-SYNCHRONIZING POLARIZING WINDOWS
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3495890 |
POLARIZING INTERFEROMETER MICROSCOPE
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3481673 |
OPTICAL COMPARISON SYSTEMS
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3475765 |
VARIABLE DENSITY PROTECTIVE EYESHADE
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3474255 |
MEANS TO DETECT AMOUNT AND DIRECTION OF SHAFT ROTATION
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3473867 |
GLARE-REDUCING REARVIEW MIRROR DEVICE
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3451751 |
DISPLAY LIGHT
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3437401 |
LIGHT-INTERCEPTING SHEET FOR AN ILLUMINATED DISPLAY DEVICE
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3423149 |
ADJUSTABLE POLARIZING EYEGLASSES
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3371979 |
Fluid-filled variable density polarizing sunglasses
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3360655 |
Angular motion sensor
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3354558 |
Teaching and self-teaching device
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