An optical apparatus flexible stop has a flexible surface element, which is flat/planar in a first state and rolled or wound into a hollow roll in a second state. Two tensioning cords guide around the hollow roll to hold the hollow roll shape. An optical apparatus is provided with a tubular body containing an optical unit and having a first open tube end, an attachment device having a device housing, wherein an optical through passage of the device housing is arranged in front of the open tube end, and the flexible stop. The flexible stop is rolled or wound around the open tube end of the tubular body and the optical through passage of the device housing, held in the shape of a tube with the tensioning cords, thus forming an optical tunnel between the open tube end and the optical through passage.

An instruction position detection device includes: a processor that acquires a movement amount of an instruction position of an indicator capable of detecting the movement amount, and performs a control of projecting, from a projection apparatus, an image including a setting image for setting an origin of the instruction position of the indicator, and the processor is configured to: acquire an input result of a setting operation of an operator in a state where an instruction for a position indicated by the setting image in a projected projection image is provided by the indicator; and perform a control of detecting the instruction position of the indicator in the image based on the position of the setting image in the image and the movement amount after the input result of the setting operation is acquired.

An optical element driving system is provided. The optical element driving system includes an optical element driving mechanism and a control assembly. The optical element driving mechanism includes a movable portion, a fixed portion, a driving assembly, and a position-sensing assembly. The movable portion is used for connecting to an optical element. The movable portion is movable relative to the fixed portion. The movable portion is in an accommodating space in the fixed portion. The driving assembly is used for driving the movable portion to move relative to the fixed portion. The control assembly provides a driving signal to the driving assembly to control the driving assembly. The position-sensing assembly is used for detecting the movement of the movable portion relation to the fixed portion and providing a motion-sensing signal to the control assembly.

An optical element driving system is provided. The optical element driving system includes an optical element driving mechanism and a control assembly. The optical element driving mechanism includes a movable portion, a fixed portion, a driving assembly, and a position-sensing assembly. The movable portion is used for connecting to an optical element. The movable portion is movable relative to the fixed portion. The movable portion is in an accommodating space in the fixed portion. The driving assembly is used for driving the movable portion to move relative to the fixed portion. The control assembly provides a driving signal to the driving assembly to control the driving assembly. The position-sensing assembly is used for detecting the movement of the movable portion relation to the fixed portion and providing a motion-sensing signal to the control assembly.

An optical lens assembly includes at least one dual molded lens element. The dual molded lens element has a central axis, and includes a light transmitting portion and a light absorbing portion. The light transmitting portion includes an optical effective region and a lens peripheral region, and the lens peripheral region surrounds the optical effective region. A light absorbing portion surrounds the optical effective region. The light transmitting portion and the light absorbing portion are made of different plastic materials with different colors, and the light absorbing portion includes at least three gate portions surrounding the central axis, wherein all gate portions are located on the same surface of the dual molded lens element. The light transmitting portion and the light absorbing portion of the dual molded lens element are integrally formed by the injection molding.

The invention concerns an adjustment system for aligning optical elements and/or samples in vacuum (3) for projecting electromagnetic radiation in the terahertz range up to the range of hard X-ray radiation, consisting of at least one vacuum chamber (3″), at least one mirror (3′) adjustable in spatial direction and/or at least one optical element adjustable in spatial direction or at least one sample adjustable in spatial direction, with translational actuators (X1, X2, Z1, Z2, Z3) in the undeflected state (idle state) being provided for adjusting the alignment of the at least one mirror (3′) adjustable in spatial direction and/or the at least one optical element adjustable in spatial direction or the at least one sample adjustable in spatial direction in a maximum of three essentially mutually perpendicular spatial directions (X, Y, Z, y, y, z).

Pursuant to the invention it is provided that the at least one mirror (3′) adjustable in spatial direction (X, Y, Z, y, y, z) and/or the at least one optical element adjustable in spatial direction (X, Y, Z, y, y, z) or sample within the vacuum chamber (3″) is mounted in a fixed position in relation to the vacuum chamber (3″), with the vacuum chamber (3″) being directly or indirectly connected with the translational actuators (X1, X2, Z1, Z2, Z3) for aligning the spatial position of the mirror and/or the optical element or the sample.

This setup facilitates a very compact and small design of the vacuum chamber and achieves a very high precision of the alignment.

An optical lens assembly includes at least one dual molded lens element. The dual molded lens element has a central axis, and includes a light transmitting portion and a light absorbing portion. The light transmitting portion includes an optical effective region and a lens peripheral region, and the lens peripheral region surrounds the optical effective region. A light absorbing portion surrounds the optical effective region. The light transmitting portion and the light absorbing portion are made of different plastic materials with different colors, and the light absorbing portion includes at least three gate portions surrounding the central axis, wherein all gate portions are located on the same surface of the dual molded lens element. The light transmitting portion and the light absorbing portion of the dual molded lens element are integrally formed by the injection molding.

A light-shielding sheet includes a base defining a first through hole and a second through hole. The first through hole and the second through hole are arranged coaxially in the base. A diameter of the first through hole is smaller than a diameter of the second through hole. The base is provided with a light-shielding coating covering an inner wall of the first through hole and the second through hole. When an incident light angle θ is between 45° and 55°, a following relationship is satisfied: 0.01≤W≤0.02; 3≤D≤3.5; 0.0122≤W/sinθ≤0.0283. W denotes a thickness of the base W, and D denotes the diameter of the first through hole.

A light-shielding sheet includes a base defining a first through hole and a second through hole. The first through hole and the second through hole are arranged coaxially in the base. A diameter of the first through hole is smaller than a diameter of the second through hole. The base is provided with a light-shielding coating covering an inner wall of the first through hole and the second through hole. When an incident light angle θ is between 45° and 55°, a following relationship is satisfied: 0.01≤W≤0.02; 3≤D≤3.5; 0.0122≤W/sinθ≤0.0283. W denotes a thickness of the base W, and D denotes the diameter of the first through hole.

A camera actuator according to an embodiment includes a housing; a prism unit disposed in the housing; and a driving unit for tilting the prism unit, wherein a ball bearing and a pulling magnet for generating attractive force to each other are disposed in the prism unit and the housing, and wherein the prism unit is supported to the housing by the attractive force between the ball bearing and the pulling magnet.