An observation optical system has an objective system and an eyepiece system in the order from the object side. The objective system includes, in the order from the object side, a first group having a positive power, a second group having a positive power, and a third group having a negative power. The objective system has an inverting optical system. The eyepiece system includes, in the order from the object side, a fourth group having a positive power and a fifth group having a positive power. The third group and the fourth group move in directions separating from each other along an optical axis to thereby perform variable power from a low magnification to a high magnification, and also the following conditional expression is satisfied:
0.28<HL/f0.55 (1).

Actuators for rotating or tilting an optical element, for example an optical path folding element, comprising a voice coil motor (VCM) and a curved ball-guided mechanism operative to create a rotation or tilt movement of the optical element around a rotation axis upon actuation by the VCM. In some embodiments, an actuator includes two, first and second VCMs, and two curved ball-guided mechanisms operative to create rotation or tilt around respective first and second rotation axes.

A camera module is provided, including a prism base, a prism driving mechanism, a prism unit, a lens unit, and an image sensor. The lens unit is disposed on the lens driving mechanism. The prism base includes a metal member, at least one first wiring layer, and a first insulation layer disposed between the metal member and the first wiring layer. The prism driving mechanism is electrically connected to the first wiring layer. The prism unit is connected to the prism driving mechanism, and the prism driving mechanism can drive the prism unit to rotate relative to the prism base. The image sensor can catch the light reflected by the prism unit and passing through the lens unit.

The invention discloses a universal mobile phone lens. The universal mobile phone lens comprises an objective lens module, sleeves, a prism module, a housing module, adjustment grooves and an ocular lens module; the sleeves comprise a first sleeve and a second sleeve; both the first sleeve and the second sleeve are hinged outside the housing module; the objective lens module and the ocular lens module are both installed inside the housing module; the prism module is installed inside the housing module and located between the objective lens module and the ocular lens module; the adjustment grooves are set outside the housing module; a sleeve groove is respectively formed inside the first sleeve and the second sleeve and is functioning with the adjustment grooves; and a stopper nail is arranged on the ocular lens module. According to the present invention, by rotating the first sleeve and the second sleeve, the objective lens module and the ocular lens module can be moved back and forth, and the distance between the ocular lens module and a mobile phone camera may be adjusted to work with different brands and models of mobile phones, henceforth, the device can be used in any kinds of cellphones, even in case of changing cellphones, it is no longer necessary to purchase a new special lens.

An imaging correction unit and an imaging module are provided. The imaging correction unit has an optical axis, and includes an optical turning element and two wedge-shaped optical elements. The optical turning element has a light emitting surface, and the light emitting surface has a first included angle with respect to the optical axis. Each of the two wedge-shaped optical elements has an inclined optical surface, and the inclined optical surface has a second included angle with respect to the optical axis. The light emitting surface of the optical turning element faces one of the two wedge-shaped optical elements, and the two wedge-shaped optical elements are rotatable relative to the optical axis.

A lens prism module relates to the field of shooting equipment and includes a fixed base, a rotating base, a mounting base, a prism, and a driving assembly. The rotating base includes rotating shafts rotatably connected with the fixed base and a connecting shaft rotatably connected with the mounting base. An axis of the connecting shaft is perpendicular to an axis of each rotating shaft. An accommodating groove accommodating the connecting shaft is provided on the mounting base. Positioning holes are on a top surface and a bottom surface of the accommodating groove. Two ends of the connecting shaft are separately rotatably disposed on a corresponding positioning hole. On a premise of realizing rotation of the mounting base, a part of the connecting shaft is hidden in the accommodating groove to reduce a volume of an overall structure of the lens prism module, thereby realizing requirements of miniaturization design.

A system comprising: a handheld mobile device comprising: a projector unit configured to project an image; a camera; and a prism configured to reflect the image projected by the projector such that the camera can capture the projected image.

In one aspect, a prism is used to separate white light into individual color components, which are used to illuminate an object in sequence. This can be effected by rotating the prism. Reflections from the object are captured by a high resolution black and white camera. A frequency detector is used to also receive the individual colors that illuminate the object so that the high-resolution pixels from the black and white camera can be correlated, for each captured value, to the specific color reflected from the object that created the pixel. In this way, the color spectrum of the object can be measured with high precision. Other examples that use stationary prisms also are disclosed. Examples are disclosed in which the prism(s) receive white light from the object and spread it in color components onto the imager.

The technology disclosed relates to enhancing the fields of view of one or more cameras of a gesture recognition system for augmenting the three-dimensional (3D) sensory space of the gesture recognition system. The augmented 3D sensory space allows for inclusion of previously uncaptured of regions and points for which gestures can be interpreted i.e. blind spots of the cameras of the gesture recognition system. Some examples of such blind spots include areas underneath the cameras and/or within 20-85 degrees of a tangential axis of the cameras. In particular, the technology disclosed uses a Fresnel prismatic element and/or a triangular prism element to redirect the optical axis of the cameras, giving the cameras fields of view that cover at least 45 to 80 degrees from tangential to the vertical axis of a display screen on which the cameras are mounted.

In one aspect, a prism is used to separate white light into individual color components, which are used to illuminate an object in sequence. This can be effected by rotating the prism. Reflections from the object are captured by a high resolution black and white camera. A frequency detector is used to also receive the individual colors that illuminate the object so that the high-resolution pixels from the black and white camera can be correlated, for each captured value, to the specific color reflected from the object that created the pixel. In this way, the color spectrum of the object can be measured with high precision. Other examples that use stationary prisms also are disclosed. Examples are disclosed in which the prism(s) receive white light from the object and spread it in color components onto the imager.