193 results about "Fixed-focus lens" patented technology

A low-light viewing device includes a housing, having mounted thereto: a lens, an electronic camera for receiving light focused by the lens and for providing an output signal; a display for receiving the output signal and displaying an image detected by the camera; a controller for controlling the camera and the display, and a user interface for operating the controller. The lens may be a fixed focus lens having an F number of less than about 1, and a T number of less than about 1.5. The display may have a resolution at least as great as the resolution of the camera. The device may have a processor programmed to provide control signals to the camera and display depending on a selected light environment.

In the image taking method where images of an object are taken by a running image taking portion provided with a zoom lens, and at least one image taking portion for measuring a distance provided with a fixed focus lens equal to the wide-angle-side end of the zoom lens to generate image data, an image taking method includes the steps of simultaneously taking an image by each image taking system and detecting and storing a zoom position at an arbitrary angle of view of the zoom lens. A search space in a photographing field in the stored zoom position is set. When it is determined that no corresponding point is on one of the end faces of the set space, a running image is taken after the zoom lens is moved to the stored zoom position by the zoom lens drive means.

In the image taking method where images of an object are taken by a running image taking portion provided with a zoom lens, and at least one image taking portion for measuring a distance provided with a fixed focus lens equal to the wide-angle-side end of the zoom lens to generate image data, an image taking method includes the steps of simultaneously taking an image by each image taking system and detecting and storing a zoom position at an arbitrary angle of view of the zoom lens. A search space in a photographing field in the stored zoom position is set. When it is determined that no corresponding point is on one of the end faces of the set space, a running image is taken after the zoom lens is moved to the stored zoom position by the zoom lens drive means.

The invention provides a fixed focus lens, comprising a first lens group, a second lens group and a third lens group which are sequentially arranged from the object side to the image side; the first lens group is provided with negative dioptre and comprises three lenses which are arranged from the object side to the image side; the lens of the first lens group closest to the object side is a non-spherical lens; the second lens group is provided with positive dioptre and comprises two lenses which are arranged from the object side to the image side; the third lens group is provided with positive dioptre and comprises six lenses which are arranged from the object side to the image side; furthermore, the dioptre of the lenses of the third lens group is sequentially negative, positive, negative, positive, positive and positive from the object side to the image side; the fixed focus lens meets the conditions as follows: (i) the absolute value of F1 / F is less than 3 and more than 0.2; (ii) F2 / F is less than 3 and more than 0.5; (iii) F3 / F is less than 3.5 and more than 0.5, wherein, F, F1, F2 and F3 are respectively the effective focus length of the fixed focus lens, the first lens group, the second lens group and the third lens group.

A fixed-focus lens capable of imaging a light valve disposed at a reduced side onto a magnified side is provided. The fixed-focus lens includes a first lens group, a second lens group, and a free form reflective mirror. The first lens group is disposed in the light path between the reduced side and the magnified side. The second lens group is disposed in the light path between the first lens group and the magnified side and includes a first free form lens. The free form reflective mirror is disposed in the light path between the second lens group and the magnified side. An imaging surface imaged from the light valve by the fixed-focus lens is a curved surface. An imaging system using the fixed-focus lens is also provided.

An optical image capturing module is provided, including a circuit assembly and a lens assembly. The circuit assembly may include a circuit substrate, a plurality of image sensor elements, a plurality of signal transmission elements, and a multi-lens frame. The image sensor elements may be connected to the circuit substrate. The signal transmission elements may be electrically connected between the circuit substrate and the image sensor elements. The multi-lens frame may be manufactured integrally and covered on the circuit substrate and the image sensor elements. A part of the signal transmission elements may be embedded in the multi-lens frame, whereas the other part may be surrounded by the multi-lens frame. The lens assembly may include a lens base, a fixed-focus lens assembly, an auto-focus lens assembly, and a driving assembly. The lens base may be fixed to a multi-lens frame.

The invention discloses a camera module and an electronic device. The camera module comprises an image sensor and a prime lens. The prime lens and the image sensor are correspondingly arranged; the prime lens comprises a first lens group and a second lens group which are arranged at intervals along the optical axis of the prime lens and can move relatively along the optical axis. The first lens group and the second lens group can move along the optical axis towards the side far away from the image sensor so that the prime lens is enabled to move from the first position to the second position.When the prime lens is located at the first position, the camera module focuses outside the image sensor, and when the prime lens is located at the second position, the camera module focuses on the image sensor. Thus, the camera module can be packaged into electronic devices such as a mobile phone with a short total length when the camera module is located at the first position, the thickness of the electronic devices such as the mobile phone cannot be increased, and lightening and thinning of the electronic devices are facilitated.

An exemplary imaging module includes a substrate, an image sensor, a lens barrel, a lens, and a holder. The image sensor is fixed on the substrate, the lens barrel is connected to the substrate to enclose the image sensor, the lens is received in the lens barrel, and the holder is connected to the lens barrel and partially receives the lens barrel therein. The lens barrel includes an elastic protruding portion protruding from the inner surface thereof. The inner surface of the protruding portion elastically abuts a side surface of the lens.

The invention provides an infrared fixed-focus lens of which component lens pieces are made of germanium featured by low chromatic dispersion, and have no surface processed to serve as diffraction optics. The infrared fixed-focus lens comprises the first lens piece disposed closer to an object and of negative refractivity, and the second lens piece disposed closer to the image plane and of positive refractivity. Both the first and second lens pieces are made of germanium.

The present invention relates to the lens technology field, especially to a wide-angle oversized aperture high-definition fixed focal lens. The lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens. The relations of each focal length are as follows: 1.5<|f3 / f|<5; 1.6<|f4 / f|<5.2; 0.9<|f5 / f|<3; 1.9<|f6 / f|<5.9; 1.5<|f2 / f|<6.5; 2.2<|f7 / f|<8.3; 4.3<|f8 / f|<13.2; 2.3<|f9 / f|<8.7. The wide-angle oversized aperture high-definition fixed focal lens can reach the large aperture of F0.95, the image surface with maximum value of 1 / 2.5', the field angle of more than 120 degrees, the resolution of six million pixels and the optical total length of less than 32mm; and moreover, the size is small and the production cost is low.

The invention discloses a prime lens and imaging equipment, and the prime lens comprises a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens and a seventh lens from an object side to an imaging surface along an optical axis; the first lens has negative focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens has negative focal power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the third lens has positive focal power, the object side surface of the third lens near the optical axis is a convex surface and has an inflection point, and the image side surface of the third lens is a convex surface ; the fourth lens has positive focal power, the object side surface and the image side surface of the fourth lens are convex surfaces; the fifth lens has negative focal power, the object side surface of the fifth lens near the optical axis is a convex surface, and the image side surface of the fifth lens is a concave surface; the sixth lens has positive focal power, and the object side surface and the image side surface of the sixth lens are convex surfaces; and the seventh lens has negative focal power, the object side surface of the seventh lens is a convex surface near the optical axis, the image side surface of the seventh lens is a concave surface near the optical axis, and the object side surface and the image side surface of the seventh lens have inflection points. The prime lens has the advantages of ultra-large wide angle, miniaturization, good thermal stability and the like.

A fixed-focus lens including a first lens group and a second lens group is provided. The first lens group having a negative refractive power includes a first lens, a second lens and a third lens arranged in sequence from an object side to an image side, in which refractive powers of the first, second and third lenses are negative, negative and positive in sequence. The second lens group having a positive refractive power is located between the first lens group and the image side, and the second lens group includes a fourth lens, a fifth lens and a sixth lens arranged in sequence from the object side to the image side, in which refractive powers of the fourth, fifth and sixth lenses are positive, negative and positive in sequence. The first, second, third, fourth, fifth and sixth lenses are separated from each other.

A fixed focus lens includes an M group that is disposed at a center of the optical system and has a positive refractive power; an F group that is disposed farther on the image plane side than the M group, has a negative refractive power, and is moved along the optical axis during focusing; a V group that is disposed farther on the object side than the M group, has a negative refractive index, and is moved in a direction orthogonal to the optical axis during vibration control; and an FC group that is disposed farther on the object side than the V group and has a positive refractive power. The V group is configured by a single lens element, and during focusing, at least the FC group and the M group are fixed.