Abstract: Disclosed is an ultra-short focus projecting optical system, which includes a display unit, a first lens group having a positive focus power, a second lens group having a positive focus power, a third lens group having a negative focus power, and an aspherical reflector arranged sequentially along a projection direction. The first lens group includes a first lens, a second lens and a diaphragm arranged sequentially along the projection direction. The first lens is a glass aspherical lens, the second lens is a glass spherical lens, and the first lens and the second lens are bent toward the diaphragm from their respective centers to their respective peripheries. The ultra-short focus projecting optical system and a projection device provided by this application can realize a large aperture and high resolution.

Abstract: Disclosed is an ultra-short focus projecting optical system, which includes a display unit, a first lens group having a positive focus power, a second lens group having a positive focus power, a third lens group having a negative focus power, and an aspherical reflector arranged sequentially along a projection direction. The first lens group includes a first lens, a second lens and a diaphragm arranged sequentially along the projection direction. The first lens is a glass aspherical lens, the second lens is a glass spherical lens, and the first lens and the second lens are bent toward the diaphragm from their respective centers to their respective peripheries. The ultra-short focus projecting optical system and a projection device provided by this application can realize a large aperture and high resolution.

Abstract: An optical system and a projection device are provided. The optical system includes a display unit, a first lens group, a second lens group, and a reflector in sequence along a transmission direction of light; both the first lens group and the second lens group have positive focal powers; the optical system satisfies the following relationship: 0.01?|?100|?0.02 and 0.005?|?200|?0.015; ?100 represents a focal power of the first lens group, and ?200 represents a focal power of the second lens group.

Abstract: The present application provides an optical system and a projection device. The optical system includes a display unit, a first lens group, a second lens group and a reflector which are sequentially arranged along a light transmission direction. The first lens group has a positive focal power, the second lens group has a negative focal power, a total of focal powers of the second lens group and the reflector is positive. A distance from a side of the first lens group close to the display unit to another side of the second lens group far away from the display unit is T0, a distance from the side of the second lens group far away from the display unit to the reflector is T, and T0/T is greater than or equal to 0.8 and less than or equal to 1.1. The optical system provided by the present application is small in size and portable.

Abstract: The present invention discloses an ultra-small-sized 4K-resolution ultra-short-focus projection optical system, which is characterized by including in sequence in a projection direction: a DMD chip, an equivalent prism, a 4K oscillating mirror, a refraction lens assembly and an aspherical reflector. Through reasonable distribution of focal power, the semi-aperture size of the reflector is reduced to be less than 50 mm, and the assembling sensitivity is substantially reduced, so that batch production can be realized.

Abstract: The present invention discloses an ultra-short throw projection optical system, where an illumination system, a refractive lens component, and an aspherical reflector are sequentially disposed in a projection direction. The present invention provides a high resolution, implements a throw ratio below 0.18, and has no diffused focus at a high temperature, and the present invention implements that a resolution is not reduced and a distortion does not become larger at different throw distances.

Abstract: The present invention discloses an optical system for adjusting and compensating a back focus through a multi-optical-path combination. The optical system includes a lens barrel. The lens barrel is provided with a lens head holder body. A light splitting component used for splitting a light beam into a plurality of light beams is arranged in the lens head holder body. The present invention may perform matching and adjustment according to a requirement of the optical system in each rate state, so that a plurality of paths of light shares a focus.

Abstract: The present invention discloses an imaging system, including an optical lens, where a spectroscopical module that can split a light wave transmitted from the optical lens into three light waves in different wavelength ranges is disposed on an imaging side of the optical lens; and the imaging system further includes three photosensitive chips configured to receive corresponding light waves, where the three photosensitive chips are correspondingly distributed at three light waves emitted by the spectroscopical module, and the spectroscopical module is a prism. In the present invention, a spectroscopical module is used to separate light whose wavelengths are different, and therefore light waves that are output from the spectroscopical module are three light waves in different wavelength ranges. These light waves in the different wavelength ranges are separately received by three different photosensitive chips.

Abstract: The present invention discloses a multi-optical shooting system, including an optical lens, where a spectroscopical module that can split a light wave transmitted from the optical lens into several light waves in different wavelength ranges is disposed on an imaging side of the optical lens; the shooting system further includes at least two photosensitive chips configured to receive light signals that are obtained by means of splitting by the spectroscopical module; the shooting system further includes an image processing system that can integrate and output light waves received by the photosensitive chips; and the spectroscopical module includes at least one spectroscopical component, where the spectroscopical component is a prism, a thin film, or a plane mirror. In the present invention, high definition of a shot image is implemented, image color restoration is good, and clear imaging can be implemented even in low illuminancy.

Abstract: An anti-shake mechanism for a lens includes a movable mechanism that is disposed between a base and a cover and that can move relative to the base and the cover, where a sensor for sensing a displacement of the movable mechanism is disposed on the cover, a drive coil is disposed on the base opposite to a front side of the movable mechanism, a drive magnet set opposite to the drive coil is disposed on the movable mechanism, a ball that enables the movable mechanism to move relative to the base in a manner of keeping a distance from the base is disposed between the base and the movable mechanism, and a floating magnet capable of mutually attracting the drive magnet is disposed on a back side of the base.

Abstract: An optical system, including, sequentially from an object side to an image side: a first lens; a second lens; a third lens; an aperture; a fourth lens; a fifth lens; a sixth lens; a seventh lens; an optical filter; and a photosensitive chip. The first lens is a meniscus aspherical lens. The second lens is a meniscus aspherical lens. The third lens is a biconvex aspherical lens. The fourth lens is a meniscus aspherical lens. The fifth lens is a meniscus spherical lens. The sixth lens is a meniscus spherical lens. The seventh lens is a biconvex aspherical lens.

Abstract: A mobile phone lens, including in the direction from an object being imaged to an imaging plane: a first lens group, a diaphragm, a second lens group, a third lens group, and a filter. The first lens group and the third lens group are stationary. The second lens group is adapted to move along an optical axis. The first lens group includes a first lens. The second lens group includes in the direction from the object being imaged to the imaging plane: a second lens, a third lens, and a fourth lens. The third lens group includes in the direction from the object being imaged to the imaging plane: a fifth lens, and a six lens.

Abstract: An optical imaging system, including a fixed lens group, a movable lens group, a first reflective optical element, a second reflective optical element, and an imaging surface. The movable lens group is driven to move by a driving mechanism. The first reflective optical element is disposed at one end of an object space and the second reflective optical element is disposed at one end of an image space. The imaging surface is disposed at one side of the second reflective optical element to receive emergent rays from the second reflective optical element.

Abstract: An optical focusing system, including: a lens group, a first reflective optical element, a second reflective optical element, and an optical sensing imaging surface. The first reflective optical element is disposed on an object end and the second reflective optical element is disposed at an image end, for reflecting light rays. The optical sensing imaging surface is disposed at the emergent surface of the second reflective optical element.