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A forehead support apparatus for resting a standing users forehead against a wall above a bathroom commode or urinal or beneath a showerhead.
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| Number | Title | Issue Date |
| 4989928 | Compact infrared lens arrangement including at least three reflections The invention relates to an infrared optical system which is capable of providing an effective focal length of about 240 mm, but fitting into a spherical package whose diameter is approximately 150 mm. To achieve such a degree of compactness, the inventio... | 02/05/1991 |
| 4955687 | Fiber optic telescope A fiber optic telescope for use as an electromagnetic energy collector, wherein two or more collector cells are connected via the fiber optic waveguide and a converging connecting means. A plurality of the cells may be connected in series or in a cascadin... | 09/11/1990 |
| 4946257 | Telescope having a removable holding ring assembly A telescope housing has a removable finger accommodating ring secured thereto. The ring is coupled to the housing by a V-shaped spring member which is inserted into a channel member located on the telescope housing. In this manner, various telescope assem... | 08/07/1990 |
| 4927256 | Multispectral optical device comprising mirrors A mirror device for providing an image of a remote object, suitable for use in a multi-spectral collimator, comprises a primary concave mirror whose surface is an off-axis portion of a paraboloid having a rotational symetry about an axis, and a secondary ... | 05/22/1990 |
| 4871219 | Wide spectral band infrared refractive lens The disclosure relates to a wide spectral band objective refractive apochromatic lens system capable of operation with infrared light in the 3 to 12 micron range with good color correction simultaneously. The lens system includes three lenses, the first l... | 10/03/1989 |
| 4869021 | Through-door viewing device An improved through-door viewing device comprising a generally rectangular telescope, a lens mounted in one end of said telescope, an eyepiece mounted in the opposite end of said telescope, a window formed in one side of said telescope adjacent said one e... | 09/26/1989 |
| 4828348 | Fiber optic telescope Disclosed is a fiber optic telescope composed of at least one fiber optic telescopic cell. The fiber optic cell is composed of a refracted light conveyor and a reflected light retriever. The refracted light conveyor is comprised of a lens, a cone, a dual ... | 05/09/1989 |
| 4828377 | Telescope aiming device A sighting device for aiming an astronomical telescope. The sighting device comprises a tubular housing which is removably mountable in the eyepiece holder of the telescope. A light source is mounted within the tubular housing for projecting light into th... | 05/09/1989 |
| 4790641 | Space telescope connected to a star tracker In order to be able to determine in a simple manner the angular deviations etween the optical axes (OT, OS) of a telescope lens (2) and of a star tracker lens (8) which arise during the course of operation of a space telescope due to external influences, t... | 12/13/1988 |
| 4755031 | Optical apparatus dehydrator An apparatus for controlling the humidity in and removing moisture from the internal volume or optical surfaces of a telescope or similar optical equipment. An apertured desiccant holder is secured to the end of an extension or support means which in turn... | 07/05/1988 |
| 4718753 | Telescope with correcting lens The present invention provides in one embodiment a Newtonian type reflecting telescope, preferably using a primary parabolic reflecting mirror, in which a meniscus lens is used to simultaneously correct for coma aberrations of both the primary reflector a... | 01/12/1988 |
| 4632547 | Autocollimating alignment telescope An autocollimating alignment telescope automatically turns a lamp on in the autocollimating operational mode, and automatically turns the lamp off in the alignment telescope operational mode. The telescope has reticles which are replaceable in the field, ... | 12/30/1986 |
| 4600265 | Infra-red optical systems An `eye-piece` system for a non-Galilean afocal infra-red telescope designed to contribute to astigmatism correction, pupil match, and true afocality without undue increase in objective aperture requirements comprises a positively powered back group and a... | 07/15/1986 |
| 4577347 | Direct view helmet mounted telescope An improved helmet is provided including an optical system whereby the wearer may telescopically acquire an image of a field of view, which comprises a telescope retractably mounted to the helmet by means of a two-part hinged boom, one end of which is piv... | 03/25/1986 |
| 4571036 | Reflecting telescope with correcting lens A reflecting telescope is provided in which a meniscus lens corrects for coma of the primary parabolic reflecting mirror, and also for coma and spherical aberration of an eyepiece, when an eyepiece is used. The meniscus lens may be formed from a plano-con... | 02/18/1986 |
| 4545655 | Optical viewing system An elongated optical system for use as a camera viewfinder. The system comprises four lens groups and four mirrors arranged around the second group to fold the system optical axis and provide for proper image orientation. Group power distribution is of fo... | 10/08/1985 |
| 4542963 | Optical system with reflective baffles Baffles (34) in infrared telescope (10) extend circumferentially around tube (12) of the telescope. Each of the baffles (34) has a concave, rearwardly facing curved surface (36) and a frontwardly facing planar surface (38). Baffles (34) extend from the in... | 09/24/1985 |
| 4486079 | Collapsible telescope A collapsible telescope is disclosed which comprises a cylindrically-shaped main body of a quadrangular cross section defined by two long side walls and two short side walls and having folding lines at its respective angled portions and at least a lid pro... | 12/04/1984 |
| 4453224 | Orbiting objective lens telescope system and method A large objective lens is placed in a highly eccentric orbit about the earth. The orbit and orientation of the lens are carefully chosen so that it focuses light or other radiation from a preselected astronomical object into an image which slowly moves ac... | 06/05/1984 |
| 4443071 | Collapsible telescope A collapsible telescope is disclosed which comprises a cylindrically-shaped main body of a quadrangular cross section defined by two long side walls and two short side walls and having folding lines at its respective angled portions and at least a lid pro... | 04/17/1984 |
| 4432596 | Infra-red optical systems An "eye-piece" system for an infra-red afocal telescope comprises a back element of positive power having a convex front surface and a curved back surface, and a pair of elements closely spaced to define a gas lens therebetween, the front element of the p... | 02/21/1984 |
| 4400065 | Multi-purpose telescope A multi-purpose telescope objective having a Petzval type lens configuration and including an iris diaphragm.... | 08/23/1983 |
| 4354733 | Rearview device incorporable in helmets A rearview device for a helmet or the like, comprising an optical system mountable on said helmet and including an objective lens which, in use, is directed rearwardly of the wearer of the helmet for receiving light from an object to the rear of the weare... | 10/19/1982 |
| 4322131 | Image transfer device using mirror moving on spherical focal surface An apparatus for transferring a portion of an image from the spherical focal surface of a telescope to a fixed viewing area. A spherical parallelogram type linkage has means for selectively positioning a mirror in the spherical focal surface of the telesc... | 03/30/1982 |
| 4279463 | Combination sun-moon filter A combination sun-moon filter employs a first filter that is mounted at the front of the telescope and a second that is mounted in the telescope near the eyepiece. Each filter transmits approximately one percent of the light that strikes it, and both filt... | 07/21/1981 |
| 4266848 | Optical system for night-vision glasses An optical system for night-vision glasses having a long focal length and a large image angle including an objective having a structural length less than 1.6f and an aperture ratio larger than 1.2, with the objective having a high distortion and an image ... | 05/12/1981 |
| 4239327 | Opaque perforated filter A light intensity filter for a telescope or other optical instrument viewed by the human eye is formed of an opaque material having a plurality of holes or windows. These windows transmit a reduced amount of light to the image-forming optical component. T... | 12/16/1980 |
| 4235507 | Optical system to condense light from a semiconductor laser into a circular spot An optical system has an objective lens for focussing on a dotted information carrying video disc the light emitted from a light source of semiconductor laser whose radiant region has different longitudinal and lateral dimensions, and a coupling lens disp... | 11/25/1980 |
| 4230902 | Modular laser printing system A laser printing system having a plurality of modules is provided wherein one of the modules comprises a laser, modulator and part of the system optics, the light output from the module being directed to a rotating scanner. The components in the module ar... | 10/28/1980 |
| 4196967 | Optical system with masking means and method for producing it In an optical system including a transparent optical body such as a lens and a light reflecting surface disposed in the rear of the transparent optical body with a spacer of a light absorptive material being sandwiched therebertween to ensure the relative... | 04/08/1980 |
| 4027943 | Solar prominence adapter A solar prominence adapter comprises a tubular housing having a first end adapted for connection with the eyepiece holder of a conventional reflecting or refracting telescope and the other end for connection with a conventional eyepiece. The housing inclu... | 06/07/1977 |
| 3990778 | Optical viewing system for high pressure environments A fiber optic system for permitting viewing of any of a plurality of selectable remote scenes in hostile environments by direct image transmission to the observer outside of the environment of the scenes. An optical image of each scene is transmitted by s... | 11/09/1976 |
| 3984845 | Projecting optical system for photodrawing machine An optical system of a photodrawing machine for photo-copying apertures onto light sensitive material minimizes undesirable effects of variations in projecting magnification and in illumination of the image forming plane. Exposure control is effected by a... | 10/05/1976 |
