Disclosed is a back focus adjustment mechanism and a camera provided with the same. The back focus adjustment mechanism comprises a driving device (10) and a positioning and guiding device (20) separately provided, wherein the positioning and guiding device (20) comprises a positioning assembly (21) and a guiding assembly (22), the guiding assembly (22) is mounted on the positioning assembly (21), and the driving device (10) is in driving connection with the guiding assembly (22) to drive the guiding assembly (22) to move. In the back focus adjustment mechanism and a camera provided with the same, after the driving device (10) and the positioning and guiding device (20) are separately provided, each structure of the back focus adjustment mechanism can be simpler, and the reliability of each structure of the back focus adjustment mechanism can be increased under the same processing precision.

Provided are an imaging device capable of accelerating AF and a focusing control method thereof. A focus lens drive unit (16) that drives a focus lens (12), and an image sensor movement drive unit (120) that moves an image sensor (110) along an optical axis (L) are included. A target position of the focus lens (12) for focusing on a subject is set, and the focus lens (12) is moved toward the target position. The image sensor (110) is moved before the focus lens (12) reaches the target position such that focusing is performed. A focusing state is maintained by moving the image sensor (110) so as to follow the focus lens (12) after the focusing is performed.

A projector includes a light source apparatus, an image formation apparatus that includes a light modulator and forms an image, the light modulator modulating light outputted from the light source apparatus, a projection optical apparatus that projects the image formed by the image formation apparatus, and an attitude adjustment apparatus that causes the light modulator to pivot around a pivotal axis perpendicular to the optical axis of the projection optical apparatus to adjust the attitude of the light modulator.

A projector includes a light source apparatus, an image formation apparatus that includes a light modulator and forms an image, the light modulator modulating light outputted from the light source apparatus, a projection optical apparatus that projects the image formed by the image formation apparatus, and an attitude adjustment apparatus that causes the light modulator to pivot around a pivotal axis perpendicular to the optical axis of the projection optical apparatus to adjust the attitude of the light modulator.

A camera module includes a lens holder having a hollow region; a first lens unit disposed in the hollow region and including at least one lens; a second lens unit disposed above the lens holder; a circuit board disposed under the lens holder; an adhesion unit disposed between a lower surface of the lens holder and an upper surface of the circuit board and configured to couple the lens holder and the circuit board to each other. The adhesion unit includes an opening and a portion of an internal space formed by a coupling of the circuit board and the lens holder is to be open to an outside through the opening of the adhesion.

A camera module includes a lens holder having a hollow region; a first lens unit disposed in the hollow region and including at least one lens; a second lens unit disposed above the lens holder; a circuit board disposed under the lens holder; an adhesion unit disposed between a lower surface of the lens holder and an upper surface of the circuit board and configured to couple the lens holder and the circuit board to each other. The adhesion unit includes an opening and a portion of an internal space formed by a coupling of the circuit board and the lens holder is to be open to an outside through the opening of the adhesion.

An embodiment of a camera module comprises: a lens portion; a front body on which the lens portion is mounted; a substrate portion arranged to be spaced from the lens portion in a first direction and coupled to the front body; an image sensor arranged on the substrate portion and provided to face the lens portion; a first fastener, one side of which is inserted into the front body such that at least a part of the substrate portion is coupled to the front body; and a first attachment portion arranged between the front body and the substrate portion, wherein the first attachment portion may comprise at least one through-hole formed between the front body and the substrate portion so as to couple the front body and the substrate portion.

A projector includes light source, plurality of light modulation devices, light combining device integrated with the plurality of light modulation devices, projection optical device, posture adjustment device that adjusts posture of the light combining device, and control device that controls operation of the posture adjustment device, the posture adjustment device includes lead screw that changes posture of the light combining device, driver that rotates lead screw, shaft member to which rotation of lead screw is transmitted, potentiometer that detects amount of rotation of the shaft member, and photosensor that may be shielded by light shielding portion provided in the shaft member, and the control device includes abnormality determination unit that determines whether or not abnormality has occurred based on detection result by the potentiometer, and return operation unit that, if occurrence of abnormality is determined, returns the light combining device to original position based on detection result by the photosensor.

A projector includes light source, plurality of light modulation devices, light combining device integrated with the plurality of light modulation devices, projection optical device, posture adjustment device that adjusts posture of the light combining device, and control device that controls operation of the posture adjustment device, the posture adjustment device includes lead screw that changes posture of the light combining device, driver that rotates lead screw, shaft member to which rotation of lead screw is transmitted, potentiometer that detects amount of rotation of the shaft member, and photosensor that may be shielded by light shielding portion provided in the shaft member, and the control device includes abnormality determination unit that determines whether or not abnormality has occurred based on detection result by the potentiometer, and return operation unit that, if occurrence of abnormality is determined, returns the light combining device to original position based on detection result by the photosensor.

An embodiment of a camera module comprises: a lens portion; a front body on which the lens portion is mounted; a substrate portion arranged to be spaced from the lens portion in a first direction and coupled to the front body; an image sensor arranged on the substrate portion and provided to face the lens portion; a first fastener, one side of which is inserted into the front body such that at least a part of the substrate portion is coupled to the front body; and a first attachment portion arranged between the front body and the substrate portion, wherein the first attachment portion may comprise at least one through-hole formed between the front body and the substrate portion so as to couple the front body and the substrate portion.