摘要:
The invention relates to personal display devices and in particular an eyepiece therefor. The eyepiece is adapted for projecting an image from an image plane on one side of the eyepiece through an exit pupil on the opposite side of the eyepiece and comprises at least one stationary lens group and at least two movable lens groups being movable with respect to the stationary lens group along an optical axis between the image plane and the exit pupil. According to the invention, the lens groups are arranged in positive-negative-positive configuration and the movable lens groups are arranged to move along the optical axis between a first state providing a first field-of-view and a second state providing a second field-of-view smaller than the first field-of-view to the image plane. The invention allows for improving optical performance and user experience of personal display devices.
摘要:
The present invention provides an eyepiece. The eyepiece is composed of one lens, which comprises a first surface and a second surface that are opposite, wherein, the first surface is a curved surface, and the second surface is a Fresnel structure surface; the Fresnel structure surface is formed by a plurality of annular zones that are sequentially arranged, to form a sawtooth surface, and each of the annular zones is formed by a working surface and a non-working surface, the working surface is an aspheric surface, and the non-working surface is a straight bevel; and the eyepiece satisfies the following conditional expression: 85°
摘要:
An eyepiece (2) for viewing a flat image, which eyepiece (2) has a wide field of view and which eyepiece (2) comprises a cemented doublet of reflecting and refracting optical components, the reflecting and refracting optical components being such that they are each of a different refractive index whereby chromatic aberrations and spherical aberrations are reduced.
摘要:
A wide-field eyepiece comprising a first, second and third lens components, the first lens component being a positive cemented doublet consisting of a negative lens and a positive lens, the second lens component being a negative cemented doublet consisting of a negative lens and a positive lens, the third lens component comprising at least two lens elements and having positive refractive power as a whole, the wide-field eyepiece having a long eyepoint distance and favorably corrected aberrations.
摘要:
An optical device insertable through a peephole in the thick wall of a chamber such as a bank vault, making it possible for an observer to obtain a panoramic view of objects dispersed within the interior thereof. The device is constituted by an optical system composed of three lens assemblies disposed serially along a common optical axis. The first assembly has wide angle characteristics to develop in front of this assembly a virtual image of the objects in the interior. The second assembly has an elongation nearly equal to the thickness of the wall, the second assembly having convergent characteristics to derive from the virtual image a final image which is formed adjacent the exit of this assembly. The third assembly has accommodation characteristics to permit an observer's eye located behind it to see the final image with an apparent diameter essentially equal to that at which the initial image can be seen at the entry of the second assembly. As a consequence, an observation of objects through the optical system is essentially equivalent in image quality to that obtainable had the observation of the initial image been made directly with the first and third assemblies.
摘要:
A wide-angle door viewer providing a large wide-angle outdoor view which can be zoomed and is readily perceptible without closely approaching the eyepiece, which comprises an optical lens barrel having relatively large diameter lenses in positions of reverse Galileo system, a mounting barrel for mounting the lens barrel to a door or the like, and a zoom barrel fitted slidably to the mounting barrel and having a relatively larger diameter eyepiece on which the large view is provided for direct but distanced observation.
摘要:
A scope for viewing the internal surfaces of bores or similar cavities which includes a rod of optically clear material having an image transmitting end, a light gathering end, and a viewing surface intermediate to these ends. An optical surface is formed internally of the rod at an angle to the axis of the rod and serves to reflect the image of the cavity surface out of the rod for viewing.
摘要:
Disclosed are alternative embodiments of a barrel type optical viewer for installation in a door or other type partition where the wide angle lens of the viewer is so connected with the forward barrel flange to avoid obstruction of the periphery of the lens. The lens is either permanently secured to the face of the flange or removably coupled therewith; and the interior bore of the barrel is lined or otherwise provided with opaque material.
摘要:
A door scope provided in a door for viewing outside from inside includes an optical system consisting of five lenses: a large diameter objective having a concave rear face, two auxiliary objectives having concave rear faces, a biconcave compensation lens and an eyepiece. The compensation lens is located behind the two auxiliary objectives or therebetween. A peep preventing device consisting of two polarizers one of which is made rotatable with respect to the other is attachable to the door scope. The compensation lens is preferably made of glass material different from that of the other lenses to correct chromatic aberration.
摘要:
Ultrawide field eyepiece for a microscope having field lens elements and eyelens elements spaced a distance behind the field lens element with an airgap therebetween. The field lens elements comprise doublet lens elements having cemented achromatic surfaces and positive refractive power as a whole. The eye lens elements comprise thick meniscus lens elements having cemented surfaces of negative refractive power and lens element(s) of positive refractive power spaced a short distance from the thick meniscus lens elements behind the same. The foremost concave surface of the meniscus lens elements is directed toward the objective lens to be used together. The radius of curvature of the front convex surface of the rear convex lens element forming a part of the meniscus lens elements, the difference in the refractive index between the front and rear lens elements of the meniscus lens elements, the difference in the Abbe''s number between the front and rear lens elements of the field lens elements, and the distance between the field lens elements and the eyelens elements satisfy certain predetermined conditions, respectively, so that ultrawide field is obtained while the eyepoint distance is made appropriately great and the missing of light in the marginal annular region of the field of view is prevented.