The present invention provides an optical element rotating device, which is simple in structure and convenient in use, and can prevent the stuck phenomenon of the rotating motion of the optical element main body from affecting the using effect of the stage light, comprising a base body, a ball holder, a ball, a ball pressing plate, an elastic element, and a cover, wherein the ball holder is sleeved outside the periphery of the base body; and the ball, the ball pressing plate, the elastic element and the cover are sequentially positioned between the ball holder and the base body from bottom to top. A stage light optical device is also disclosed, comprising an optical element main body and the rotating device, wherein the optical element main body is positioned on the base body of the rotating device.

An adjustable mechanical holder for finely adjusting a position of an element attachable or attached to the mechanical holder includes a stationary fastening region configured to fasten the mechanical holder to a holding structure and a holding region configured as a mounting for the element. At least a first parallelogram linkage is disposed between the holding region and the fastening region. The first parallelogram linkage connects the holding region movably to the fastening region. The mechanical holder further includes a first movable actuator, by which the holding region is movable by the first parallelogram linkage along a first spatial direction.

An adjusting module and a projector are provided. The adjusting module includes a frame, an optical assembly, an elastic assembly and an adjusting member. The optical assembly is fixed to the elastic assembly. The elastic assembly is detachably assembled on the frame, and includes a fixing portion, a first elastic portion and a second elastic portion. The fixing portion is fixed to the optical assembly. The first and second elastic portions respectively include first and second hooks and first and second elastic arms. The first and second elastic arms are respectively connected to the fixing portion, and the first and second hooks are respectively assembled to the frame. The adjusting member penetrates through the through hole and leans against the optical assembly. When the adjusting member is adjusted, the optical assembly is displaced relative to the frame in a plane perpendicular to an incident optical axis.

An optical system can include a receiver secured to a first optical component and a flexure arrangement secured to a second optical component. The flexure arrangement can include a plurality of flexures, each with a free end that can extend away from the second optical component and into a corresponding cavity of the receiver. Each of the cavities can be sized to receive adhesive that secures the corresponding flexure within the cavity when the adhesive has hardened, and to permit adjustment of the corresponding flexure within the cavity, before the adhesive has hardened, to adjust an alignment of the first and second optical components relative to multiple degrees of freedom.

A projection exposure apparatus for semiconductor lithography includes a component and fixed to a structural part of the apparatus. The component and/or the structural part have/has a stop for bearing against a reference surface at the structural part and/or the component. The stop is movable relative to the component fixed and/or the structural part so that it can be moved away from the reference surface. A method for adjusting a component on a structural part of a projection exposure apparatus includes: securing a stop to the component or the structural part; positioning the component so that the stop comes into mechanical contact with a reference surface at the component or the structural part; fixing the component to the structural part; and moving the stop away from the reference surface.

An optical module includes a housing, an optical component, a first elastic member and a second elastic member. The housing has a first end, a second end and a through hole, wherein the first end is opposite to the second end. The optical component is disposed in the through hole. The optical component has a third end and a fourth end, wherein the third end is opposite to the fourth end, the third end protrudes from the first end, and the fourth end protrudes from the second end. The first elastic member is rotatably disposed on the first end and abuts against the third end. The second elastic member is rotatably disposed on the second end and abuts against the fourth end.

A holographic sight comprises a unitary optical component carrier. The unitary optical component carrier may comprise a body with a first receptacle configured to receive a laser diode, a second receptacle configured to receive a mirror, a third receptacle configured to receive a collimating optic, a fourth receptacle configured to receive a grating, and a fifth receptacle configured to receive an image hologram. A laser diode may be received within opposing walls formed by the first receptacle. A mirror may be received in, and abut one or more surfaces of the second receptacle. A collimating optic may be received in, and abut one or more surfaces of the third receptacle. A grating may be received in, and abut one or more surfaces of the fourth receptacle. A hologram image may be received in, and abut one or more surfaces of the fifth receptacle.

An optical fiber holder for holding an optical fiber includes: a holder main body; and a groove part that is capable of holding a part of the held optical fiber. The optical fiber holder has an adjustment mechanism that is capable of adjusting a position of the groove part with respect to the holder main body in a state where the groove part is placed on the holder main body.

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.

An optical element includes: an optical function part; a flange disposed outside the optical function part; and a direction indication part in a part of the flange. A difference in level between the direction indication part and a flat surface of the flange is 2 m or less. The optical function part and a part of the flange may be covered with an antireflection film.