An auxiliary staring and imaging focusing device includes an illumination system, an imaging system, a staring device and a focusing device. The illumination system has an illumination optical-path to project a detection light to illuminate a fundus of a subject's eye. The imaging system has an imaging optical-path for receiving a reflected light and a fundus image of subject and imaging the reflected light and fundus image on an image display. The staring device is located in the illumination optical-path and forms a staring surface provided with staring points contrast with a detection light for the subject to watch. The focusing device is provided with a split-image screen in the illumination optical-path. The split-image screen has a shutter with a default size, and two facing prisms are disposed on the shutter and a light-transmitting space is formed between two prisms for a center staring point to pass through.

An auxiliary staring and imaging focusing device includes an illumination system, an imaging system, a staring device and a focusing device. The illumination system has an illumination optical-path to project a detection light to illuminate a fundus of a subject's eye. The imaging system has an imaging optical-path for receiving a reflected light and a fundus image of subject and imaging the reflected light and fundus image on an image display. The staring device is located in the illumination optical-path and forms a staring surface provided with staring points contrast with a detection light for the subject to watch. The focusing device is provided with a split-image screen in the illumination optical-path. The split-image screen has a shutter with a default size, and two facing prisms are disposed on the shutter and a light-transmitting space is formed between two prisms for a center staring point to pass through.

In a portable electronic device having a digital camera function, focusing of an image may be accomplished by moving a movable image sensor assembly relative to a lens assembly that is affixed in a housing. An image sensor drive, such as a voice coil motor to move the movable image sensor assembly, may be positioned between the movable image sensor assembly and the lens assembly concentric with the lens assembly.

Surveillance networks are used to observe large areas, like public places, streets, public buildings or private houses, privates premises etc. The surveillance networks often comprise a plurality of surveillance cameras. Such surveillance cameras should be small, robust, trouble-free and have low-maintenance requirements. Subject-matter of the invention is a linear actuator (8) for a linear motion of a component of a camera (1), the linear actuator comprising a supporting structure (6), a motor (10) arranged on the supporting structure for generating a rotational movement, a component carrier (7) for carrying the component and for performing the linear motion relative to the supporting structure, a gear mechanism (11) for transmitting the rotational movement, whereby the last gear of the gear mechanism before the component carrier is a transfer gear (20), whereby the transfer gear comprises a guide way (23a, b, c) extending in rotational direction of the transfer gear with a slope along the guide way whereby the component carrier is coupled with the guide way by resting means (24a, b, c), so that the component carrier is displaced in the linear direction (9) by a rotational movement of the transfer gear due to the slope of the guide way.

Surveillance networks are used to observe large areas, like public places, streets, public buildings or private houses, privates premises etc. The surveillance networks often comprise a plurality of surveillance cameras. Such surveillance cameras should be small, robust, trouble-free and have low-maintenance requirements. Subject-matter of the invention is a linear actuator (8) for a linear motion of a component of a camera (1), the linear actuator comprising a supporting structure (6), a motor (10) arranged on the supporting structure for generating a rotational movement, a component carrier (7) for carrying the component and for performing the linear motion relative to the supporting structure, a gear mechanism (11) for transmitting the rotational movement, whereby the last gear of the gear mechanism before the component carrier is a transfer gear (20), whereby the transfer gear comprises a guide way (23a, b, c) extending in rotational direction of the transfer gear with a slope along the guide way whereby the component carrier is coupled with the guide way by resting means (24a, b, c), so that the component carrier is displaced in the linear direction (9) by a rotational movement of the transfer gear due to the slope of the guide way.

A method and a device for measuring the topography and/or the gradients and/or the curvature of an optically active surface of an object are disclosed. The device allows the object to be arranged in a receiving region with a contact surface for contact with the object. Inside the device, there is a plurality of point light sources that provide light that is reflected at the surface to be measured of an object arranged in the receiving region. The device includes at least one camera with an objective assembly and an image sensor for detecting a brightness distribution which is produced on a light sensor by the light of the point light sources reflected at the surface to be measured.

A method and a device for measuring the topography and/or the gradients and/or the curvature of an optically active surface of an object are disclosed. The device allows the object to be arranged in a receiving region with a contact surface for contact with the object. Inside the device, there is a plurality of point light sources that provide light that is reflected at the surface to be measured of an object arranged in the receiving region. The device includes at least one camera with an objective assembly and an image sensor for detecting a brightness distribution which is produced on a light sensor by the light of the point light sources reflected at the surface to be measured.

An electronic device and a camera apparatus are provided. The camera apparatus includes a lens, a driving member, a photosensitive chip, and a first refractor; the first refractor can deflect a propagation direction of light, and the first refractor is connected with the driving member. When the first refractor is located at the first position, the first refractor is located outside a path of light incident from the lens and received by the photosensitive chip, the light incident from the lens forms a first image through a first pixel sub-area of the photosensitive chip, when the first refractor is located at the second position, the first refractor is located on the path, and the light incident from the lens passes through the first refractor and forms a second image through a second pixel sub-area of the photosensitive chip.

Various embodiments include a camera with a voice coil motor (VCM) actuator assembly to provide autofocus (AF) and/or optical image stabilization (OIS) movement. The VCM actuator assembly is configured to move an image sensor of the camera in three dimensions (e.g. X, Y, and Z) to provide the AF and/or OIS movements. The VCM actuator assembly is asymmetrical and includes an at least partially open side that allows an optical assembly of the camera to pass through the open side of the VCM actuator. In some embodiments, the optical assembly is part of a folded optics arrangement of the camera that includes one or more prisms/and or lenses.

Various embodiments include a camera with a voice coil motor (VCM) actuator assembly to provide autofocus (AF) and/or optical image stabilization (OIS) movement. The VCM actuator assembly is configured to move an image sensor of the camera in three dimensions (e.g. X, Y, and Z) to provide the AF and/or OIS movements. The VCM actuator assembly is asymmetrical and includes an at least partially open side that allows an optical assembly of the camera to pass through the open side of the VCM actuator. In some embodiments, the optical assembly is part of a folded optics arrangement of the camera that includes one or more prisms/and or lenses.