A lens module of reduced size includes a base and an adhesive body. The base includes a first base portion and a second base portion located outside the first base portion. The first base portion is made of plastic and the second base portion is made of metal. The base further comprises a slot. The adhesive body is received in the slot and connects the first base portion and the second base portion. The disclosure also provides an electronic device having the lens module.

The optical system includes a base having a groove and an adjacent slot therein. The system also includes at least one optical cell slidably alignable along the groove, and at least one clamp comprising a lower end and an upper end. The lower end is slidably alignable along the slot and is secured at a set location so that the upper end secures the at least one optical cell along the groove. The slot may extend parallel to the groove. The clamp may include at least one preloaded fastener arrangement securing the lower end of the clamp to the base. The preloaded fastener may include a bolt, a spring biasing the bolt, and a threaded backing plate within the slot and receiving the bolt.

A camera matte box electrically controls an adjustable lens filter. The camera matte box includes a body, at least one adjustable flap, a filter holder, a changeable lens adapter, and an electrical filter control module. The electrical filter control module adjusts a position of the adjustable filter according to a command received using a communication interface. The filter holder removably holds the adjustable filter and a non-adjustable filter in the body.

An optical assembly is for polarizing a laser beam. The optical assembly has a plurality of plate-shaped optical elements having a beam entry surface and a beam exit surface, and a holder configured to joint fix the plate-shaped optical elements. At least three spacers are arranged between each two adjacent ones of the plate-shaped optical elements. Each of the spacers is configured to provide punctiform contact with the respective beam exit surface of a first plate-shaped optical element, of the plate-shaped optical elements, and to provide punctiform contact with the respective beam entry surface of a second adjacent plate-shaped optical element, of the plate-shaped optical elements.

A camera assembly includes a motor configured to generate a driving power; a motor shaft that extends from the motor, such as to define a first axis, and is configured to rotate by the driving power of the motor; a pulley configured to rotate on a second axis, that is spaced from the first axis, according to rotation of the motor shaft; a belt configured to couple the motor shaft and the pulley, and convert the rotation of the motor shaft to rotation of the pulley, and tension of the belt applies a force to the motor shaft in a direction towards the second axis; a camera module configured to be mounted on the pulley and rotate together with the pulley; and an elastic body configured to apply a biasing force to the motor shaft such as to bias the motor shaft in a direction away from the second axis.

A spectroscopic module includes a plurality of beam splitters that are arranged along an X direction; a plurality of bandpass filters disposed on one side in a Z direction with respect to the plurality of beam splitters facing the plurality of beam splitters, respectively; a light detector disposed on the one side in the Z direction with respect to the plurality of bandpass filters and including a plurality of light receiving regions facing the plurality of bandpass filters, respectively; a first support body supporting the plurality of beam splitters; and a second support body supporting the plurality of bandpass filters. The second support body includes a support portion in which a support surface is formed so as to be open to the one side in the Z direction. The plurality of bandpass filters are disposed on the support surface.

The present disclosure provides an external filter holder arrangement that comprises a pair of filter holding slots to hold two different filters such as barrier filter and excitation filter to thereby fit into any type of xenon source light microscope. The external filters holder design can be used in any type of operative microscopes by altering the dimensions of the slots and the holding mechanism. The external filter holder 100 uses various combinations of filters that can be used in the same module which aids to carry out different surgeries such as angiogram, tumour surgery, urology and thereof. Thus, the external filter holder arrangement 100 is universal, cost-effective and can be customized to various older or base variant xenon light source microscopes.

To provide a polarizing plate capable of excellently controlling reflectance characteristics, a polarizing plate manufacturing method, and an optical apparatus including the polarizing plate. Provided is a polarizing plate 10 with a wire grid structure, including: a transparent substrate 1 and a grid-shaped convex portion 6 arranged on the transparent substrate at a pitch shorter than a wavelength of light of a use band and extending in a predetermined direction, wherein the grid-shaped convex portion 6 includes a reflection layer 2, a first dielectric layer 3, and an absorption layer 4 in order from the transparent substrate 1, and wherein the reflection layer and the first dielectric layer have substantially the same width and a minimum width of the absorption layer is smaller than a minimum width of the reflection layer and the first dielectric layer as viewed from a predetermined direction.

A focus-adjustment apparatus which can be applied during manufacture of camera modules includes a rotation mechanism, a drive mechanism, an elevating mechanism, an optoelectronic chip, and a lens module. The rotation mechanism includes a container and movable latch rods therein. The drive mechanism can rotate the rotation mechanism, and the elevating mechanism with optoelectronic chip attached is under the rotation mechanism. The lens module includes a support element adjacent to the optoelectronic chip, an adjustment structure rotatably disposed on the support element, and a lens above the optoelectronic chip in the adjustment structure. When the elevating mechanism raises the lens module and the drive mechanism rotates the rotation mechanism, at least one of the latch rods rotates the adjustment structure, so as to change the distance between the lens and the optoelectronic chip and achieve correct focus.

A camera module includes a lens driving device having a housing, a first circuit board disposed below the housing, a filter disposed on an upper surface of the first circuit board, a second circuit board disposed below the first circuit board, an image sensor disposed on the second circuit board and coupled to a lower surface of the first circuit board, and a first adhesive member disposed between the lower surface of the first circuit board and an upper surface of the second circuit board, and electrically connecting the first circuit board and the second circuit board. A lower surface of the image sensor is higher than the upper surface of the second circuit board.