32results about How to "With wide angle" patented technology

The invention discloses an imaging lens which sequentially comprises a first lens, a second lens, a third lens and a fourth lens along the optical axis from the object side to the image side. The object-side surface of the first lens is concave. The image-side surface of the fourth lens is concave. The second lens has positive refractive power. At least one of the first lens, the third lens and the fourth lens has negative refractive power. The effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens meets the condition that f3/f4>0.

The invention discloses an optical imaging lens, which sequentially comprises the following components from an object side to an image side along an optical axis: a first lens, a second lens, a thirdlens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, wherein the first lens has an optical power, an object-side surface of the first lens is a concave surface, and an image-side surface of the first lens is a convex surface; the second lens has an optical power; the third lens has a positive optical power; the fourth lens has a negative optical power; the fifth lens has a positiveoptical power; the sixth lens has an optical power, an object-side surface of the sixth lens is a convex surface, and an image-side surface of the sixth lens is a concave surface; and the seventh lens has a negative optical power.

The invention provides an infrared confocal optical system. The infrared confocal optical system comprises a first lens set, a diaphragm and a second lens set. The first lens set comprises a first lens having negative power and a second lens having positive power. The second lens set comprises a third lens having positive power, a fourth lens having positive power, a fifth lens having negative power and a sixth lens having positive power. The diaphragm is located between the second lens and the third lens. According to the infrared confocal optical system, through composition of the two lens sets and the diaphragm, on the premise that a larger lens size, more lenses and a more complicated structure are not needed and therefore cost is controlled, the infrared confocal optical system has the advantages of having a wide angle, a high periphery brightness ratio, a large relative aperture, high definition and the like; the infrared confocal optical system further has the advantage that infrared rays are confocal.

The invention discloses a wide-angle lens. The wide-angle lens sequentially comprises a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens and a sixth lens along an optical axis from an object side to an image surface, wherein the first lens has a negative focal power, the second lens has a negative focal power, the third lens has a positive focal power, the fourth lens has a positive focal power, the fifth lens has a negative focal power, the fourth lens and the fifth lens are combined to form a lens group, the sixth lens has a positive focal power, the first lens and the third lens both are glass spherical lenses, the second lens, the fourth lens, the fifth lens and the sixth lens are all plastic non-spherical lenses, the wide-angle lens conforms to a condition formula of 1.5<TTL/R3<3, TTL expresses optical overall length of the wide-angle lens, and R3 expresses curvature radius of an object side surface of the second lens. The wide-angle lens has the advantages of miniaturization, low cost, large wide angle and the like and can have favorable resolution in an outer extremely-severe environment.

The invention discloses a camera lens group. The camera lens group comprises a first lenswith focal power, a second lens with focal power, a third lens with positive focal power, a fourth lenswith focal power, a fifth lens with positive focal power and a sixth lens with negative focal power along the optical axis from the object side to the image side in sequence, whereinthe object side surface ofthe first lens is a concave surface, and the image side surface is a convex surface; the object side surface of the second lens is a convex surface, and the image side surface is a concave surface;the object side surface of the fifth lens is aconcave surface, and the image side surface is aconvex surface; object side surface of the sixth lens is aconvex surface, and the image side surface is aconcave surface. Ahalf of diagonal line length ImgH in the effective pixel region on the imaging surface of the camera lens group meets the condition that ImgH is larger than 4.60 mm.

The invention discloses an optical imaging lens group, which sequentially comprises,from an object side to an image side along an optical axis, a first lens having negative focal power; a second lenshaving focal power; a third lens having focal power, wherein the image side surface of the third lens is a convex surface; a fourth lens having positive focal power; a fifth lens having focal power; asixth lens having focal power; a seventh lens having focal power, wherein the image side surface of the seventh lens is a convex surface; and an eighth lens having negative focal power. The effectivefocal length f4 of the fourth lens and the total effective focal length f of the optical imaging lens group meet the condition that f4/f is larger than 2 and smaller than 3.

The invention discloses an optical lens. The lens sequentially comprises a first lens, a second lens, a third lens and a fourth lens from an object side to an image side along an optical axis, whereinthe first lens has negative focal power, an image side surface of the first lens is a concave surface, at least one surface of the first lens is an aspheric surface, the second lens has positive focal power, an object side surface of the second lens is a convex surface, the third lens has positive focal power, an object side surface of the third lens is a convex surface, at least one surface is aspheric, the fourth lens is a lens with negative focal power and high refractive power, the half-image height IH of the optical lens and the total optical length TTL of the optical lens satisfy IH/TTL< 0.27, optical distortion of the optical lens is smaller than 25%, the field angle FOV of the optical lens is larger than or equal to 101 degrees, and the total optical length TTL of the optical lens and the optical back focus BFL of the optical lens meet the condition that TTL/BFL is larger than 3.8.

The invention discloses a wide-angle lens and imaging equipment, and the wide-angle lens sequentially comprises a first lens with negative focal power from an object side to an imaging surface along an optical axis, wherein the object side surface is a convex surface, and the image side surface is a concave surface; a second lens having focal power, wherein the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; a third lens having positive focal power, wherein the image side surface of the third lens is a convex surface; a diaphragm; a fourth lens having positive focal power, whereinthe object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; a fifth lens having positive focal power, whereinthe object side surface of the fifth lens is a convex surface or a plane, and the image side surface of the fifth lens is a convex surface; a sixth lens having negative focal power, wherein the object side surface of the sixth lens is a concave surface; and a seventh lens having positive focal power, whereinthe object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface, wherein the fifth lens and the sixth lens form a bonding body. The wide-angle lens at least comprises an aspheric lens. The wide-angle lens has the advantages of large aperture, high pixel and good thermal stability.

A wide-angle lens comprises the first to fifth lenses arranged in sequence from the object side to the image side; the 1st, 2nd, and 4th lenses respectively have a negative refraction power, object side surfaces of said three are respectively convex surfaces, and image side surfaces of said three are respectively recessed surfaces; the third lens has a positive refraction power, the object side surface is a recessed surface, and the image side surface is a convex surface; the 5th lens has a positive refraction power, and the object side surface and the image side surface are respectively convex surfaces; the wide-angle lens satisfies with the following relation: 8.5 <TTL / F <11.25, thus providing wide angle and miniaturization characteristics.

The invention discloses an optical camera lens, which sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side along an optical axis, wherein an object side surface and an image side surface of the first lens are both concave surfaces, and at least one surface is an aspheric surface; The second lens element with positiverefractive power has a convex image-side surface, and at least one surface is an aspheric surface; the third lens element has negative refractive power, a convex object-side surface and a concave image-side surface, and at least one surface is an aspheric surface; the fourth lens has negative focal power, and an object side surface and an image side surface are both concave surfaces; the fifth lens element has a convex image-side surface and at least one surface is an aspheric surface; and a sixth lens element with negative refractive power has an image-side concave surface and at least one surface is an aspheric surface. By reasonably distributing the focal power and the surface type of each lens, the center thickness of each lens and the on-axis distance between the lenses, the optical camera lens has the advantages of ultra-thinness, miniaturization, wide angle, low sensitivity and high imaging quality.

The invention discloses a pick-up lens group. The pick-up lens group sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens with focal power from an object side to an image side along an optical axis, at least one lens among the first to the fifth lenses is provided with an aspheric mirror surface which is in non-rotational symmetry. And the maximum effective radius DT11 of the object side surface of the first lens meets the condition that DT11 is less than 0.80 mm.

The invention discloses an optical imaging system and an imaging apparatus having the same. The optical imaging system includes, in order from an object side to an image side, a first lens element toa seventh lens element, wherein the first lens has negative refractive power and has a convex object side at a paraxial region and a concave image side at a paraxial region; the second lens with negative refractive power has an image side being concave in a paraxial region; the third lens with refractive power has an object side being convex in a paraxial region and an image side being concave ina paraxial region; the fourth lens with refractive power has an image side being concave in a paraxial region; the fifth lens element with positive refractive power has an image side being convex in aparaxial region; the sixth lens with refractive power has an object side being convex in a paraxial region; and the seventh lens has refractive power. Therefore, both the first lens and the second lens have negative refractive power and can diverge incoming light, so a wide angle can be obtained; and the fifth lens has positive refractive power so as to focus the light before imaging, so imagingis clearer.

The invention belongs to the field of optical lenses and discloses an image pickup optical lens. The image pickup optical lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object side to an image side; at least one of the first lens to the sixth lens comprises a free-form surface; the focal length of the image pickup opticallens is f; the focal length of the first lens is f1; and the focal length of the third lens is f3. The above parameters satisfy the following relational expressions: 0.70<=f1/f<=0.95; 0.80<=f3/f. Theimage pickup optical lens provided by the invention has good optical performance and meets the design requirements of ultra-thinness, wide angle and good imaging quality.

The invention relates to the field of optical lenses, and discloses a camera shooting optical lens. The camera shooting optical lens comprises eight lenses which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens in sequence from the object side to the image side. At least one of the first to eighth lenses comprises a free-form surface; and the focal length of the camera shooting optical lens is f, the focal length of the fourth lens is f4, the curvature radius of the object side face of the fifth lens is R9, the curvature radius of the image side face of the fifth lens is R10, and the following relational expressions are met: 1.30 <= f4/f <= 5.00, and 0 <= (R9 + R10)/(R9-R10) <= 4.50. The camera shooting optical lenscan have good optical performance while being ultrathin and wide in angle, aberration can be effectively corrected, and the performance of an optical system is further improved.

The invention discloses an optical imaging lens, which sequentially comprises a first lens with positive focal power, a second lens with focal power, a third lens with focal power, a fourth lens with focal power, a fifth lens with focal power, and a sixth lens with focal power from an object side to an image side along the optical axis, wherein the object side surface of the fifth lens is a convex surface, the image side surface of the fifth lens is a convex surface, the object side surface of the sixth lens is a concave surface, and in the first lens to the sixth lens, at least one non-rotationally symmetrical aspheric surface is arranged from the object side surface of the first lens to the image side surface of the sixth lens, the center thickness CT1 of the first lens on the optical axis and the center thickness CT3 of the third lens on the optical axis meet the condition that CT3/CT1 is larger than 0.3 and smaller than 0.5, and the total effective focal length f of the optical imaging lens, the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens meet the condition that f/(f3+f4) is larger than 0 and smaller than 0.6.