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After World War II Leupold & Stevens began making gun scopes after Marcus Leupold failed to hit a deer with his rifle. His scope fogged up and he is reported to have exclaimed "Hell! I could build a better scope than this!" as the deer bounded off. [3] [4] In 1962, Leupold invented the Duplex Reticle, which most riflescopes now use. [6]
The axial resolution is typically 2-3 μm [4] [5] even with structured illumination techniques. [10] [11] The spatial dispersion generated by the diffraction grating ensures that the energy in the laser is spread over a wider area in the objective lens, hence reducing the possibility of damaging the lens itself.
A - Objective B - Galilean telescopes (rotating objectives) C - Zoom control D - Internal objective E - Prism F - Relay lens G - Reticle H - Eyepiece The stereo , stereoscopic or dissecting microscope is an optical microscope variant designed for low magnification observation of a sample, typically using light reflected from the surface of an ...
The optical microscope, also referred to as a light microscope, is a type of microscope that commonly uses visible light and a system of lenses to generate magnified images of small objects. Optical microscopes are the oldest design of microscope and were possibly invented in their present compound form in the 17th century.
The lenses are called the eye lens and the field lens. The focal plane is located between the two lenses. It was invented by Christiaan Huygens in the late 1660s and was the first compound (multi-lens) eyepiece. [2] Huygens discovered that two air spaced lenses can be used to make an eyepiece with zero transverse chromatic aberration.
Fiducials of known pattern and size can serve as real world anchors of location, orientation and scale. They can establish the identity of the scene or objects within the scene. For example, a fiducial printed on one page of an augmented reality popup book would identify the page to allow the system to select the augmentation content. It would ...
the third lens together with the second images the directions image on a 2-dimensional optical sensor (e.g., electronic camera). This simple arrangement is the basis for all conoscopic devices (conoscopes). It is not straight forward however to design and manufacture lens systems that combine the following features:
A telecentric lens is a special optical lens (often an objective lens or a camera lens) that has its entrance or exit pupil, or both, at infinity. The size of images produced by a telecentric lens is insensitive to either the distance between an object being imaged and the lens, or the distance between the image plane and the lens, or both, and ...