|
Match
|
Document |
Document Title |
|
|
4171872 |
Compact four element afocal lens
A compact substantially afocal lens comprising two components each including two elements adapted for use as a magnifying attachment for an objective with an internal stop. Compactness in an afocal...
|
|
|
4153339 |
Zoom lens
In a zoom lens consisting of a first lens group having a negative refractive power and a second lens group having a positive refractive power with the air separation between the first and second...
|
|
|
4151752 |
Device for the excitation of waves and especially ultrasonic waves including a cell
The device comprises a lens and a source for emitting a beam of parallel light rays or ultrasonic rays at right angles to a flat dioptric element. The lens surface which is located opposite to the...
|
|
|
4133600 |
Method of manufacturing and utilizing holographic lens means
Holographic lenses are formed on a substantially transparent scanning disc wherein a line focus is the object for each hologram. Such hologram is then used to reconstruct the line focus at the...
|
|
|
4099846 |
Variable magnification lens system
In a variable focus objective an axial air space between a negative front lens and a positive rear lens component is variable for zooming. The first component is movable for focusing independently...
|
|
|
4094585 |
Loupe
A magnifier or loupe of high magnifying power comprising a positive singlet followed by a cemented doublet in the overall form of a meniscus having bi-convex and bi-concave elements. The cemented...
|
|
|
4086000 |
Viewfinder optics with zero power doublet
A chromatically neutral viewfinder optical system of positive forward and rearward elements and including therebetween a substantially zero power doublet which neutralizes chromatic errors...
|
|
|
4027944 |
Illuminated system for vertical fluorescent microscopy
A vertical illuminator for imaging a light source at the back aperture of a microscope objective for use in fluorescent microscopy has a light source, an axially-movable positive meniscus lens...
|
|
|
3999840 |
Wide angle objective having a non-spherical surface
A retrofocus wide angle objective with the backfocal length being at least two times the overall focal length, comprising in optical alignment, a plurality of negative meniscus lenses of forward...
|
|
|
3992085 |
Large aperture wide angle lens system employing an aspherical surface
A large aperture wide angle lens which employs such aspheric surfaces as satisfying the condition of B (Ni' - Ni) < O c (ni' - Ni) < O, wherein one plane out of the lens group at rear of...
|
|
|
3967884 |
Three element objective lens
An objective lens comprising a front positive meniscus element, a middle negative biconcave element and a rear positive biconvex element. Improved optical performance at a relative aperture of...
|
|
|
3958864 |
High power photographic objective with large angular field
A high power lens for photograhic purposes, having a relatively large angular field. The lens has at least seven air spaced members, at least three of which are behind a central vertex space, those...
|
|
|
3936154 |
Short focal length large aperture optical system
This invention relates to a short focal length, large aperture optical system primarily designed to efficiently transmit light rays to an image plane with an extraordinarily high degree of...
|
|
|
3932148 |
Method and apparatus for making complex aspheric optical surfaces
Complex aspheric optical surfaces may be made reliably and relatively rapidly by a method in which one surface of a relatively thick glass block is ground and polished to the desired aspheric...
|
|
|
3917766 |
Manufacture of optical elements
An optical element comprising a glass substrate portion on which a portion of a plastics material having approximately the same index of refraction as glass is molded. Shrinkage of the plastics...
|
|
|
3914032 |
Device for observing and photographing the fundus of eye
A device for observing and photographing the fundus of eye including an optical system for directly observing or photographing the fundus of the eye of a person to be inspected and an optical...
|
|
|
3912379 |
Three element objective lens having asphoric surfaces on the middle element
A three element objective lens having a front positive biconvex element, a middle negative biconcave element and a rear positive biconvex element. The first and second elements are formed of...
|
|
|
3910685 |
Three element objective lens with aspheres on rear surfaces of first and second elements
A three element objective lens having a front positive meniscus element, a middle negative element and a rear positive biconcave element. Improved optical performance at a relative aperture of at...
|
|
|
3886544 |
Keyboard using optical switching
The invention relates to keyboard devices using optical switching and includes novel light distribution means to multiple fiber optics, switching means between fiber optics, and collection means...
|
|
|
3883733 |
Optical construction of a lens
A lens for directing light from a light source along an extension of the lens centerline. The lens may have any desired color and is in the form of a section of a thin spherical shell. The convex...
|
|
|
3877815 |
MONITORING MEANS FOR MAKING HEADLAMP LENSES
A moulded lens for use in a headlamp, especially a road vehicle headlamp, the lens being formed in the moulding operation with a series of corrugations arranged to produce in use when the...
|
|
|
3832035 |
WIDE ANGLE, RETROFOCUS-TYPE PHOTO-TAKING LENS
A wide angle, substantially distortion-free inverted telephoto-type photo-taking lens system comprises a forward divergent group, a forward convergent group preceding a diaphragm, and a rearward...
|
|
|
3828358 |
EXPOSURE APPARATUS FOR THE DIRECT PHOTOGRAPHIC PRODUCTION OF A PHOSPHOR SCREEN ON THE FACE-PLATE OF A COLOR PICTURE TUBE
In an exposure apparatus or lighthouse for use in the direct photographic production of a phosphor screen on the face-plate of a color picture tube or kinescope of the type having a mask with...
|
|
|
3800085 |
CONVERTIBLE DIRECT VIEWING/PROJECTION T-V SYSTEM
A converter attachable to a standard television set whereby the set, when the converter is disconnected, may be directly viewed in the usual manner, but when the converter is operating, functions...
|
|
|
3798445 |
TRAFFIC SIGNAL LENS
The invention relates to a traffic light lens preferably formed of polycarbonate material. The inner face of the lens is formed in a mosaic arrangement of rectangular, lenticular areas. The...
|
|
|
3778133 |
LENS SYSTEM HAVING AT LEAST ONE THIN, HIGHLY DEFORMED PLATE WITH ASPHERICAL SURFACES
Four embodiments of fast (F/2 or faster), wide angle (70°), infrared lens systems are disclosed. Each of the lens systems is formed of a plurality of thin, highly deformed germanium plates. Each...
|
|
|
3751138 |
VARIABLE ANAMORPHIC LENS AND METHOD FOR CONSTRUCTING LENS
An anamorphic lens is disclosed which generates variable cylindrical lens power and variable cylindrical lens rotational alignment over incremental viewpoints chosen through its surface. Cylinder...
|
|
|
3736048 |
OPTICAL OBJECTIVES OF VARIABLE EQUIVALENT FOCAL LENGTH
A zoom lens having an improved zooming range and comprising a convergent first member which for a given object distance remains stationary during the zooming relative movements, an axially movable...
|
|
|
3722979 |
OPTICAL SYSTEM OF THE REAL IMAGE TYPE FOR FINDERS HAVING ASPHERIC SURFACES
A finder optical system of the real image type comprises four identical non-spherical lenses arranged on a single common optical axis and constituting, in the direction of incident light rays...
|
|
|
3693301 |
METHOD FOR PRODUCING OPTICAL ELEMENTS WITH ASPHERICAL SURFACES
A method for producing optical elements with aspherical surfaces with a pneumatic device for deforming the plates to be formed into optical elements. The plates are deformed by reducing the...
|
|
|
3682534 |
OBJECTIVES OF VARIABLE FOCAL LENGTH
A zoom lens front member which is divergent and is divided into two divergent parts, of which the rear part only is movable for focusing purposes, in accordance with the following relationships:...
|
|
|
3664065 |
METHOD AND APPARATUS FOR GENERATING SURFACES OF REVOLUTION
Method and apparatus for generating, on optical material or metal, aspheric surfaces of revolution. Basically, the subject invention includes a lever arm pivotally mounted at one end portion...
|
|
|
3628850 |
CORRECTING LENS
A correcting lens for use in the formation of fluorescent dots on a color picture tube, which has its effective surface divided into a plurality of sections each of which consists of a flat or...
|
|
|
3604786 |
COMPACT AFOCAL MAGNIFYING LENS
Compact six-element afocal magnifying lenses suitable for use as attachments to photographic objective lenses are described. The overall length of an afocal lens designed according to this...
|
|
|
3602085 |
PHOTOGRAPHIC IMAGE-FOCUSING DEVICE
An image-focusing plate for cameras comprises two or four parts formed from wedge prisms arranged to form an image-intersection line which is displaced along its length through an angle not...
|
|
|
3583790 |
VARIABLE POWER, ANALYTIC FUNCTION, OPTICAL COMPONENT IN THE FORM OF A PAIR OF LATERALLY ADJUSTABLE PLATES HAVING SHAPED SURFACES, AND OPTICAL SYSTEMS INCLUDING SUCH COMPONENTS
A plurality of refracting plates, which are generally perpendicular to an optic axis along which they are in tandem, have quintic or higher order surfaces that are relatively movable laterally in...
|
|
|
3507565 |
VARIABLE-POWER LENS AND SYSTEM
|
|
|
3497577 |
METHOD OF PRODUCTION OF PLASTIC LENSES WITH ASPHERICAL SURFACES
|
|
|
3486808 |
GRADIENT REFRACTIVE INDEX OPTICAL LENSES
|
|
|
3472577 |
WIDE ANGLE LONG EYE-RELIEF EYEPIECE
|
|
|
3454686 |
METHOD OF SHAPING AN ASPHERIC LENS
|
|
|
3386354 |
Lens system for correcting effect of earth's magnetic field in color tubes
|
|
|
3366736 |
Lens magnifier apparatus
|
|
|
3360659 |
Compensated optical scanning system
|
|
|
3356002 |
Wide angle optical system
|
|
|
3348896 |
Modified gauss type of optical objective for use in ultraviolet light
|
|
|
3328589 |
Photoelectric apparatus for providing pulsing signals including stacked plate focussing means
|
|
|
3326623 |
S-lens corrected for aberrations of focus
|
|
|
3305294 |
Two-element variable-power spherical lens
|
|
|
3285129 |
Triple element s-lens focusing system
|