摘要:
A display including an optical lens and a light valve is provided. The optical lens includes a first lens, a second lens, and a third lens arranged in sequence from a light emitting side to a light incident side. The light valve is disposed at the light incident side. The light valve provides an image beam. The optical lens is configured to receive the image beam. The image beam forms a stop at the light emitting side. The stop has the smallest cross-sectional area of a beam shrinkage of the image beam. A range of an OPD of the image beam on an active surface of the light valve is - 2.0λ
摘要:
Provided is an interactive lens assembly, including first lens, a second lens, an aperture stop, a third lens and a filter from an object side of the interactive lens assembly to an image side of the interactive lens assembly in turn. The first lens is of a negative focal power, an image side surface of the first lens is concave; the second lens is of a focal power; the third lens is of a positive focal power, an image side surface of the third lens is convex, and each of the first lens, the second lens and the third lens is made of a plastic material; the interactive lens assembly meets the following formulas: (CT1+CT2)/CT3
摘要:
A projection lens PL comprises, in order from a projection side: a first lens component L1 which has positive refractive power and is biconvex; a second lens component L2 which has negative refractive power and is meniscus; and a third lens component L3 which has positive refractive power and has a convex lens surface facing the projection side, lens surfaces on the projection side and an object side of the first lens component L1 and lens surfaces on the projection side and the object side of the second lens component L2 being aspherical, and the following conditional expression being satisfied: 0.2 f / - f 2 0.7 where f2 denotes focal length of the second lens component, and f denotes a focal length of the projection lens.
摘要:
An optical lens including a first lens, a second lens, and a third lens arranged in sequence from a light emitting side to a light incident side is provided. A light valve is disposed at the light incident side. The optical lens is adapted to receive an image beam provided by the light valve. The image beam forms a stop at the light emitting side. The stop has the smallest cross-sectional area of a beam shrinkage of the image beam. The optical lens of the invention has the advantages of small size, light weight, large viewing angle, and high resolution.
摘要:
An imaging lens includes an aperture stop, a first lens having positive refractive power, a second lens having negative refractive power, a third lens having positive refractive power, and a fourth lens having negative refractive power. Both surfaces of the first lens, both surfaces of the second lens, both surfaces of the third lens, and both surfaces of the fourth lens are formed as aspheric surfaces. The following condition expression (1), condition expression (2), and condition expression (3) are satisfied. - 1.09 ≤ f 2 / f ≤ - 0.81 - 1.62 ≤ f 2 / f 1 ≤ - 1.42 0.65 ≤ f 3 / f ≤ 0.97 in which f1: the focal length of the first lens f2: the focal length of the second lens f3: the focal length of the third lens f: the focal length of the lens whole system
摘要:
Provided is an image pickup lens (1)for a solid image pickup element, which is composed of three glass lenses. The image pickup lens (1) is constituted to have an array including, sequentially in a recited order from an object side, a first lens (L1) having a convex surface directed toward an object and having a positive refractive index, an aperture diaphragm (S), a second lens (L2) having a convex surface directed toward the object and having a negative refractive index, and a third lens (L3) having a concave surface directed toward the object and having a positive refractive index, and is also constituted to have all lens surfaces made aspherical. The image pickup lens satisfies the following conditional equations (A0) and (A1) so that it has a satisfactory optical performance and a compactness at a low cost for a solid image pickup element. Also provided is an image pickup device employing the image pickup lens. f/f2
摘要:
The present invention includes, from the object side to the image plane side (P), an aperture stop (1) with a predetermined diameter, a first lens (2) with a positive refractive power and a bi-convex shape with convex surfaces facing the object side and the image plane side, a second lens (3) being formed as a meniscus shape with a concave surface facing the object side having a negative refractive power, and a third lens (4) being formed as a meniscus shape with a convex surface facing the object side having a positive refractive power. By having a positive refractive power for the first lens (2) and third lens (4) and a negative refractive power for the second lens, a suitable back focus can be maintained while reducing the total length of the lens system. The imaging lens is thin and compact and has superior optical properties suited for mobile cameras mounted in portable telephones and PDAs.
摘要:
Die Erfindung betrifft ein Optiksystem für das Abbilden eines Objektbereichs (12) mit einem optischen Strahlengang (16r, 16r') in einer Bildebene (27a, 27b, 27c) eines Bilderfassungssystems. Das Optiksystem enthält eine von dem optischen Strahlengang (16r) durchsetzte erste Optikbaugruppe (18) und eine auf der dem Objektbereich (12) abgewandten Seite der ersten Optikbaugruppe (18) in dem optischen Strahlengang (16r) angeordneten zweiten Optikbaugruppe (24). Erfindungsgemäß ist die zweite Optikbaugruppe (24) als ein in dem Wellenlängenbereich des Lichts 625 nm ≤ λ ≤ 850 nm auftretende Farblängsfehler der ersten Optikbaugruppe (18) wenigstens teilweise kompensierendes System ausgebildet.