摘要:
A fixed-focus lens including a first lens group, a second lens group, and a third lens group is provided. The first lens group has a negative refractive power, includes a plurality of lenses, and is disposed between an object side and an image side. The lenses of the first lens group include at least one aspheric lens. The second lens group is disposed between the first lens group and the image side and has a positive refractive power. The third lens group is disposed between the second lens group and the image side and has a positive refractive power. The third lens group includes a first triple cemented lens and a second triple cemented lens arranged from the object side to the image side in sequence.
摘要:
A fixed-focus lens including a first lens group, a second lens group and a third lens group which are arranged in sequence from an object side to an image side is provided. The first lens group has a negative refractive power and includes a first lens and a second lens arranged in sequence from the object side to the image side, and both having negative refractive powers. The first lens is an aspheric lens. The second lens group has a positive refractive power and includes a lens with positive refractive power. The third lens group has a positive refractive power and includes at least one first cemented lens. The fixed-focus lens satisfies 1.2
摘要翻译:提供了包括从物体侧到像侧依次布置的第一透镜组,第二透镜组和第三透镜组的固定焦点透镜。 第一透镜组具有负屈光力,并且包括从物体侧到像侧依次排列的第一透镜和第二透镜,并且具有负折射力。 第一透镜是非球面透镜。 第二透镜组具有正折光力并且包括具有正屈光力的透镜。 第三透镜组具有正屈光力并且包括至少一个第一胶合透镜。 固定焦距透镜满足1.2 <| fG1 / f | <4.2和2.8 <| fL2 / f | <8.6,其中f,fG1和fL2是固定焦点透镜,第一透镜组和第二透镜组的有效焦距 镜头。
摘要:
A fixed-focus lens includes a first lens group and a second lens group. The two lens groups have positive refractive powers. The first lens group is composed of a first negative lens, a second negative lens, a third negative lens, a fourth positive lens and a fifth positive lens arranged in sequence from an object side to an image side. The first lens is an aspheric lens. The second lens group is composed of two cemented lens and a positive lens between them. The fixed-focus lens satisfies the following conditions: (1)5.0 3.755, wherein FL45 is an effective focal length (EFL) from the fourth lens to the fifth lens, FG2 is an EFL of the second lens group, F is an EFL of the fixed-focus lens, and H is the maximum image height of the image side.
摘要:
A fixed-focus lens including a first lens group, a second lens group and a third lens group which are arranged in sequence from an object side to an image side is provided. The first lens group has a negative refractive power and includes a first lens and a second lens arranged in sequence from the object side to the image side, and both having negative refractive powers. The first lens is an aspheric lens. The second lens group has a positive refractive power and includes a lens with positive refractive power. The third lens group has a positive refractive power and includes at least one first cemented lens. The fixed-focus lens satisfies 1.2
摘要翻译:提供了包括从物体侧到像侧依次布置的第一透镜组,第二透镜组和第三透镜组的固定焦点透镜。 第一透镜组具有负屈光力,并且包括从物体侧到像侧依次排列的第一透镜和第二透镜,并且具有负折射力。 第一透镜是非球面透镜。 第二透镜组具有正折光力并且包括具有正屈光力的透镜。 第三透镜组具有正屈光力并且包括至少一个第一胶合透镜。 固定焦距透镜满足1.2 <| fG1 / f | <4.2和2.8 <| fL2 / f | <8.6,其中f,fG1和fL2是固定焦点透镜,第一透镜组和第二透镜组的有效焦距 镜头。
摘要:
A fixed-focus lens including a first lens, a second lens, a cemented lens, an aperture stop, and a fifth lens is provided. The first lens disposed between an object side and an image side has a negative refractive power. The second lens disposed between the first lens and the image side has a positive refractive power. The cemented lens is disposed between the second lens and the image side. The cemented lens consists of a third lens and a fourth lens arranged in sequence from the object side to the image side. One of the third lens and the fourth lens has a positive refractive power, and the other has a negative refractive power. The aperture stop is disposed between the fourth lens and the image side. The fifth lens disposed between the aperture stop and the image side has a positive refractive power.
摘要:
A fixed-focus lens disposed between an object side and an image side is provided. The fixed-focus lens includes a reflector, a curved reflector, a first lens group, and a second lens group disposed in sequence from the object side to the image side. The first lens group includes two aspheric lenses. The second lens group includes a spherical lens and an aspheric lens, wherein the aspheric lens of the second lens group is closest to the image side in the second lens group. Besides, an effective focal length (EFL) of the fixed-focus lens is f, an EFL of the second lens group is f2, and a clear aperture of the aspheric lens of the second lens group is D. The fixed-focus lens satisfies one of following conditions: 0.04
摘要:
An image pickup apparatus includes a lens, an image sensor, an optical filter, and a driving device. The lens focuses light beams from at least one subject to form an optical image, and the image sensor receives the optical image and converts the optical image into at least one electric signal. The optical filter includes a first plate and a second plate, the first plate is disposed between the lens and the image sensor, and the second plate is disposed between the first plate and the image sensor. The driving device moves the second plate. The second plate has substantially the same index of refraction as the first plate, and a thickness of the second plate is continuously decreased or increased across the second plate.
摘要:
A zoom lens and a zoom lens module are provided. The zoom lens is configured to form an image of an object at an object side onto an image plane at an image side. The zoom lens includes a first lens group, a second lens group, a third lens group and a fourth lens group disposed in sequence from the object side towards the image side. The refractive powers of the first lens group, the second lens group, and the third lens group are negative, positive, and negative, respectively. The zoom lens satisfies 1.90
摘要:
A zoom lens and a zoom lens module are provided. The zoom lens is configured to form an image of an object at an object side onto an image plane at an image side. The zoom lens includes a first lens group, a second lens group, a third lens group and a fourth lens group disposed in sequence from the object side towards the image side. The refractive powers of the first lens group, the second lens group, and the third lens group are negative, positive, and negative, respectively. The zoom lens satisfies 1.90
摘要:
A zoom lens disposed between an object side and an image side and including a first, second, third, and fourth lens group is provided. The first lens group has a negative refractive power and includes a first lens and a prism arranged in sequence from the object side to the image side. The first lens is an aspheric lens. A distance between the first lens and the prism is L, an effective focal length of the zoom lens at a wide-end is fw, and 1.58