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DE742610C
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Galileo glass
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DE735509C
|
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Werkstueckhilfschaltstueck for the correct angle grinding of the surfaces of optical prisms
|
|
DE720141C
|
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Signing of optical interfaces
|
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DE718733C
|
|
Method for producing aspherical surfaces
|
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DE718433C
|
|
Microscope with two object planes
|
|
DE718532C
|
|
Method for aligning the optical axes of binoculars
|
|
DE734061C
|
|
Arrangement to increase the light output of cinema projectors
|
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DE719206C
|
|
Optical projector system
|
|
DE720272C
|
|
Method and device for checking the position of the glasses relative to the eyes of the wearer
|
|
DE718864C
|
|
Magnifying glass with a protective housing that completely covers the lens surfaces
|
|
DE720815C
|
|
Optical system for enlarged reproduction of the images on the curved screen of a cathode ray tube
|
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GB460015A
|
|
Improvements in magnetic compasses
|
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DE728514C
|
|
Galilean telescope
|
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GB441995A
|
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Improvements in magnifying glasses
|
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GB440996A
|
|
Improvements in magnifying glasses
|
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GB422691A
|
|
Improved appliance for use in examining the cavities of the nose, ears and throat
|
|
GB400115A
|
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Improvements in photophones
|
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GB313338A
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Improvements in mirrors for optical projection
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GB300468A
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Improvements in photographic lenses
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