Abstract: An optical system is capable of enhancing vision of low vision individuals using a simple adjustment mechanism that requires a minimum length of travel to effect a desired adjustment. First and second substantially perpendicular mirrors are mounted in a cluster for pivotable movement. An entrance mirror is pivoted in response to pivoting movement of the mirror cluster so as to ensure proper convergence when the object to be viewed is close to the objective lens or lenses in a binocular system. The system also includes an objective lens and an eyepiece lens and is readily mounted to a conventional eyeglasses frame.

Abstract: An optical system is capable of enhancing vision of low vision individuals using a simple adjustment mechanism that requires a minimum length of travel to effect a desired adjustment. First and second substantially perpendicular mirrors are mounted in a cluster for pivotable movement. An entrance mirror is pivoted in response to pivoting movement of the mirror cluster so as to ensure proper convergence when the object to be viewed is close to the objective lens or lenses in a binocular system. The system also includes an objective lens and an eyepiece lens and is readily mounted to a conventional eyeglasses frame.

Abstract: An optical system is capable of enhancing vision of low vision individuals using a simple adjustment mechanism that requires a minimum length of travel to effect a desired adjustment. First and second substantially perpendicular mirrors are mounted in a cluster for substantially linear movement. A third mirror is substantially parallel to the first mirror and pivotal about an axis substantially transverse to the direction of linear movement of the cluster. Pivotal movement of the third mirror may be automatic in response to linear movement of the mirror cluster so as to ensure substantially proper convergence when the object to be viewed is about one meter (or closer) from the objective lens or lenses in a binocular system. A fourth mirror is substantially parallel to the second mirror and substantially perpendicular to the third mirror. An objective lens cooperates with the first and third mirrors, and an eyepiece lens with the second and fourth mirrors.

Abstract: A small, light, wide field (e.g. about a 15 degree field of view), Keplerian bioptic telescope is provided which preferably is mounted in association with conventional eyeglasses. A casing includes first and second open ends, a middle section, and an optical system mounted within it. The optical system includes an eye lens adjacent the casing first end, an objective lens adjacent the casing second end, and a right angle prism and penta prism between the eye lens and objective lens, disposed side by side, typically with faces in face to face engagement. A field lens may be provided between the eye lens and the prisms. The position of the objective lens is adjustable by movement toward and away from the casing middle section. An opening may be formed in a first eyeglass lens and the casing press fit into the opening so that the first end of the casing is on a first side of the eyeglass lens and the middle section is on the second side of the eyeglass lens opposite the first side, extending about 1.

Abstract: Camouflage materials that are highly visible to humans but inconspicuous to dichromatic animals are provided. The camouflage materials emit, or simulate emission, of light at or about the neutral point of a dichromatic animal. One kind of camouflage material contains a coloring agent, which limits photopic light emissions from the material to occur at or about the neutral point. Another kind of camouflage material contains at least two coloring agents, which limit photopic light emissions to at least two bands of wavelengths. The respective proportions and spectral properties of these coloring agents are chosen so that the combination of photopic light emitted by camouflage materials incorporating them simulates the appearance of monochromatic light at or about the neutral point.

Abstract: The present invention relates to a method and apparatus for extending the range and accuracy of electronic and electro-optical systems for determining the distance from a reference object to another object. A multiplicity of range baselines is employed, and a computer, usually a microprocessor, is used to automatically switch between baselines to extend the total measurement range, to increase the precision of range measurement over a prespecified set of ranges, or both. The invention has applications in a wide variety of range measuring systems, including robotics, autofocus cameras, autofocus binoculars, and autofocus vision aids for people with impaired vision.