The invention relates to a laser material processing system comprising a collimation optic (K) having a total collimation focal length (fK), consisting of: a beam supply (Z) for divergent beams (D); a first and second optical device (Ll, L2) having a positive or negative focal length (fl, f2), wherein the divergent beams (D) first pass through the first optical device (Ll) and subsequently pass through the second optical device (L2), and leave the second optical device (L2) in a collimated state; a third optical device (0) arranged downstream of the collimation optic (K) and having a positive focal length (fO) that focuses the beams (P) leaving the collimation optic (K) in a collimated state to a focus (F); a first and second adjusting element (Al, A2) for independently moving the first or the second optical device (LI, L2) away from one another along a beam propagation direction (R), wherein a total beam path (gs) between the beam supply (Z) and an image-side focal plane (B) of the third optical device (0) is smaller that twice the sum of the positive focal length (fO) of the third optical device (0) and the total collimation focal length (fK).

Techniques are disclosed for optical distortion reduction in projection systems for scanning projection and/or lithography. A projection system includes an illumination system configured to generate illumination radiation for generating an image of an object to be projected onto an image plane of the projection system. The illumination system includes a field omitting illumination condenser configured to receive the illumination radiation from a radiation source and provide a patterned illumination radiation beam to generate the image of the object, wherein the patterned illumination radiation beam comprises an omitted illumination portion corresponding to a ridge line of a roof prism disposed within an optical path of the projection system.

An optical redirection adapter for an electronic device having a camera includes a housing. An optical element is attached to the housing and positioned such that, when the adapter is attached the electronic device, the optical element is positioned in the camera's field of view. The optical element reflects light in the camera's field of view from a redirection angle that is offset from the camera's field of view. The optical redirection adapter facilitates ergonomically sound use of the camera.

Methods and apparatus for implementing a camera having a depth which is less than the maximum length of the outer lens of at least one optical chain of the camera are described. In some embodiments a light redirection device, e.g., a mirror, is used to allow a relatively long optical chain with a relatively large non-circular outer lens. In some embodiments the light redirection device has a depth, e.g., front of camera to back of camera dimension, which is less than the maximum length of the aperture of the outer lens in the aperture's direction of maximum extent. Multiple optical chains with non-circular outer lenses arranged in different directions may and in some embodiments are used to capture images with the captured images being combined to generate a composite image.

A head-mounted display (HMD) system includes an optical arrangement; a first image panel, wherein the optical arrangement directs image light from the first image panel along a first optical pathway; a second image panel, wherein the optical arrangement directs image light from the second image panel along a second optical pathway different from the first optical pathway; and a third image panel and a fourth image panel, wherein the third and fourth image panels are spaced apart from each other and the optical arrangement directs light from the third image panel and the fourth image panel along different optical pathways. The optical arrangement is configured such that light from the first image panel and the third image panel are emitted from the HMD system in a combined fashion in a first eye direction, and light from the second image panel and the fourth image panel are emitted from the HMD system in a combined fashion in a second eye direction different from the first eye direction.

Techniques are disclosed for magnification compensation and/or beam steering in optical systems. An optical system may include a lens system to receive first radiation associated with an object and direct second radiation associated with an image of the object toward an image plane. The lens system may include a set of lenses, and an actuator system to selectively adjust the set of lenses to adjust a magnification associated with the image symmetrically along a first and a second direction. The lens system may also include a beam steering lens to direct the first radiation to provide the second radiation. In some examples, the lens system may also include a second set of lenses, where the actuator system may also selectively adjust the second set of lenses to adjust the magnification along the first or the second direction. Related methods are also disclosed.

A head-up display device includes a housing, a projection unit projecting light representing an image, and an optical unit leading the light projected from the projection unit to a windshield of a vehicle. The optical unit includes a magnifying optical unit attached to the housing and reflecting the light toward the windshield, a screen attached to the housing and reflecting or transmitting the light toward the magnifying optical unit, and an incident angle changing unit changing an incident angle of the light that goes incident on the screen.

The eyeball-projection display apparatus 1 includes an image display device 5 for showing an image, and a virtual image projection optical system 10 in which an image shown by the image display device is optically guided into the eyeball of a viewer for projection of a virtual image, wherein the virtual image projection optical system 10 includes an eyepiece optical system 2 having an eyepiece optical element 20 including an eyepiece transmitting surface 21 and an eyepiece reflecting surface 22 for reflecting off a light ray incident from the eyepiece transmitting surface 21 and again guiding the light ray back into the same eyepiece transmitting surface 21, having a medium filled in between the eyepiece transmitting surface 21 and the eyepiece reflecting surface 22, the medium having a refractive index of greater than 1, and further including a back-surface reflecting mirror capable of only one reflection in an effective optical path and having a positive power; a relay optical system 4 having a positive power, and including a prism optical element 40 having a curved, internal-reflecting surface that is decentered with respect to a center chief ray Lc, being filled in with a medium having a refractive index of greater than 1 and being capable of plural internal reflections, and receiving light from the image display device 5 for projection of an intermediate image of an image onto an exit side of the display apparatus 1; and a reflecting element 3 that is positioned in an optical path between the eyepiece optical system 2 and the relay optical system 4 and includes an intermediate reflecting surface 30 to reflect a light beam incident obliquely from a side of the display apparatus, on which the relay optical system 4 is located, toward a side of the display apparatus 1, on which the eyepiece optical system 2 is located, thereby deflecting an optical path.

An optical apparatus includes a light source unit, at least one first light modulation element, an illumination optical system configured to illuminate the first light modulation element using light from the light source unit, and a relay optical system configured to make conjugate with each other a predetermined surface on an optical path between the light source unit and the first light modulation element, and a surface of the first light modulation element. The relay optical system includes, in order from the predetermined surface to the first light modulation element, a first reflection surface having a positive power, a second reflection surface having a negative power, and a third reflection surface having a positive power. The relay optical system satisfies a predetermined condition.

An optical redirection adapter for an electronic device having a camera includes a housing and an optical element. The optical element is attached to the housing and positioned such that, when the adapter is attached the electronic device, the optical element is positioned in the camera's field of view. The optical element reflects light in the camera's field of view from a redirection angle that is offset from the camera's field of view. The optical redirection adapter facilitates ergonomically sound use of the camera.