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Document |
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RE30592 |
Large aperture extended range zoom lens
Disclosed is an optical design for a variable focal length lens of large effective aperture which is focusable over an extended range including the "macro" range and is provided with a high degree...
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4240697 |
Lens system having selectively shiftable focal length
A zoom lens system is constructed of a focusing member, variator, compensator and an image-forming lens arranged on a common optical axis in this order with respect to incident light to function as...
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4157211 |
Zoom lens having an easily changeable range of variable focal distance
A zoom lens having a lens part for focusing, a zooming part consisting of a plurality of movable lens groups to vary focal distance, and a lens part for imaging in the rear of the zoom lens. The...
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4146305 |
Variable lens which can have its focal distance range easily changed
A variable magnification lens which can have its focal distance range easily changed and has a focusing lens group, a variable lens group and an imaging lens group positioned in said order from an...
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4099844 |
Variable focal lens having a divergent front element
Variable focus lens systems having a fixed divergent lens element, a movable convergent lens component, and a basic objective lens group having a fixed lens element and a movable lens component,...
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4054371 |
Compact varifocal lens system capable of macrophotography
A compact varifocal lens system, such as a zoom lens assembly, is provided having a front focusing lens component of negative refractive power, a variator lens component of positive refractive...
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3972591 |
Greatly variable magnification zoom lens system of large aperture ratio
Attention has been directed to the fact that in zoom objective lens systems, the compensator for compensating the focal point shift caused by the zoom movement of the variator has generally two...
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3924934 |
COMPACT SEVEN ELEMENT ZOOM LENS WITH MECHANICAL COMPENSATION
A compact seven lens element zoom lens is described. It comprises a zoom group of four lens elements followed by an objective group of three lens elements. The zoom group, contrary to the common...
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3920315 |
Zoom projection lens
A projection lens system primarily for a motion picture projector is a glass and plastic lens design enabling lower manufacturing cost than a comparable all glass design of similar optical...
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3697155 |
COMPACT ZOOM LENS
Particular lens parameters are provided which give good corrections in a high aperture, wide-angle zoom lens which has a positive power zoom portion and a strong fourth surface. The zoom lens has a...
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3679286 |
ZOOM LENS OBJECTIVE FOR STEREOSCOPIC VISION MICROSCOPES
The invention is a low-power zoom lens system for a stereoscopic vision microscope characterized by an objective having four lens members, the first and the fourth lens members being fixedly...
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3658411 |
FOLDED PATH ZOOM LENS
A foldable zoom lens system including a simple triplet fixed portion and a zoom portion that includes a reversed-telephoto front objective with a mirror between the negative and positive components...
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3653749 |
VARIABLE-MAGNIFICATION AFOCAL OPTICAL LENS SYSTEM
A variable-magnification afocal optical lens system which may be used in combination with a photographic lens of a motion-picture camera using 8 mm film or a projection lens of a projector so that...
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3649101 |
ZOOM LENS
A foldable zoom lens system including a simple triplet fixed portion and a zoom portion that includes a reversed-telephoto front objective with a mirror between the negative and positive components...
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3603669 |
VARIABLE FOCUS OBJECTIVE
A variable-focus objective comprises in order starting from the front, a first divergent fixed-focusing group, two movable groups, one convergent and the other divergent, said two movable groups...
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3547523 |
ZOOM OBJECTIVE LENS SYSTEM WITH HIGHLY REDUCED SECONDARY CHROMATIC ABERRATION
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3533678 |
ZOOM TYPE PROJECTION LENS SYSTEM HAVING THREE MOVABLE MEMBERS AND A FINITE FOCUS
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3529888 |
CATADIOPTRIC OPTICAL SYSTEM FOR TELESCOPES AND THE LIKE
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3512872 |
VARIABLE MAGNIFICATION LENS SYSTEM
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3507555 |
ZOOM LENS OPTICAL SYSTEM
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3501224 |
ZOOM LENS HAVING FOUR LENS GROUPS
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3481664 |
LARGE APERTURE AND WIDE ANGLE ZOOM LENS SYSTEM
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3456998 |
ZOOM TYPE OPTICAL SYSTEM FOR MICROSCOPE
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3437395 |
OPTICAL SYSTEM FOR INVERTED MICROSCOPE
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3433559 |
VARIABLE FOCAL LENGTH OPTICAL SYSTEM
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3421807 |
ZOOM LENS SYSTEM FOR MICROSCOPE
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3410631 |
Zoom type optical system for magnifier
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3393958 |
Compact zoom lens corrected over a large range of magnification
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3367734 |
Supplementary objective with continuously variable magnification
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3363964 |
Optical objective system with interchangeable varifocal and telescopic lens groups
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3360325 |
Zoom lens system for microfilm projectors
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3360327 |
Zoom optical system for microscope
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3353891 |
Zoom lens system having front mounted axially movable aperture stop to control numerical aperture during magnification change
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3353892 |
Binocular stereoscopic microscope having substantially achromatic wedge prisms adjacent common front objective lens
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3191496 |
Optical objectives of variable focal length of the zoom type and control means therefor
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3185029 |
Linear zoom optical system
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3161719 |
Pancratic lens system relay
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3152211 |
Wide angle lens attachment
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3152210 |
Wide angle attachment
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3034404 |
Variable focal objectives
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2782684 |
Variable magnification optical systems
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3671099 |
Title is not available
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