A lens for a small film format still camera which comprises four lens elements disposed behind the aperture defining means, and includes a double convex convergent lens element, a second double concave divergent lens element, a third double convex convergent element, and a fourth concave-plano lens element.

A lens of five elements comprising a first bi-convex element, a second meniscus element, a third bi-concave element, a fourth meniscus element, and a fifth bi-convex element with an aperture stop between the meniscuses and the concave surfaces of the meniscuses facing the aperture.

A lens is formed in a generally rectangular shape, and a reflection-preventing portion capable of preventing reflection of harmful rays is provided on at least one edge plane forming at least a portion of the perimeter of the lens, so that the lens is capable of suppressing deterioration of the quality of images including object images formed by a photographic lens system, in order to obtain better photographic images.

A lens assembly, which is mounted on a digital still camera (DSC), comprises a fixed aperture, and a lens unit. The lens unit has a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence. The first lens is a biconcave lens disposed at the front side of the lens unit. The second lens is a biconvex lens. The third lens is a biconcave lens. The fourth lens is a positive meniscus lens. The fifth lens is a positive lens. The aperture is arranged between the first lens and...

The invention is a lens. The light transmitting portion of the lens comprises a plurality of fiber optic strands arranged parallel to each other in a side-by-side manner, forming a planar layer. The fiber optic strands are also inclined at an angle to a surface of the lens. This defeats any reflection from the interior of the lens, which gives virtual invisibility to the lens face or surface when the light source is not in use. In operation, when a light source is illuminated, the lens is then l...

A lens or lens system for use in reading optical data has as one component a pickup lens having finite or infinite conjugates. The pickup lens is biaspheric where the surfaces may have spherical, paraboloidal or general conic base curves and higher order correction terms up to 40th order when required. Various methods of making such a lens of plastics material are also disclosed.

Disclosed is a lens, which has a convex surface, a concave surface and a flange that is formed around the lens to be projected in a radial direction perpendicular to an optical axis and to be continued from the convex surface. The flange is provided with a groove formed on the side of the convex surface that extends from the outer edge of the convex surface toward the outer edge of the flange. When the lens is pulled up from a solution of coating material, the unnecessary solution that collects ...

A convex lens has a geometric axis, defined to be an axis passing through the lens at a central point normally to the general plane of the lens, spaced from its optical axis defined to be an axis passing through the lens between its focal points. The lens may be manufactured from a mould, at least one concave surface of which has a center point spaced from a deepest point, said mould having a feed point at an edge point substantially in a plane extending from said center point through said deepe...

A lens of a transparent material including a structured surface on one side and a smooth surface on the opposite side. The structured surface includes a plurality of three-faceted prisms arranged side by side to form a plurality of ridges and grooves. Each prism has a reflective surface adjacent to a refractive surface and a riser adjacent to the refractive surface. The surfaces are angled with respect to one another so that incident light is transmitted through the lens, whereby the exiting ray...

A control circuit sets the lens shutter in action in response to the opening action of a focal plane shutter and closes the focal plane shutter after the lens shutter is closed, so that the proper exposure function of the lens shutter is maintained when the focal plane shutter is opened or closed.