Abstract: A frame for a display tile made of a first material with a first coefficient of thermal expansion and fastened to a first substrate made of a second material with a second coefficient of thermal expansion. The frame is divided into three parts: a first part to be glued by the adhesive to a lateral side of the substrate, a third part to serve as fastening interface to another structure and a second part to isolate the third part from strain in the first part. Grooves are formed in the second part, the grooves being substantially straight and substantially parallel to the first substrate, the frame having at least one opening made in one of the grooves etched in the metal frame to locally adjust the bending stiffness of the metal frame.

Abstract: A frame for a display tile made of a first material with a first coefficient of thermal expansion and fastened to a first substrate made of a second material with a second coefficient of thermal expansion. The frame is divided into three parts: a first part to be glued by the adhesive to a lateral side of the substrate, a third part to serve as fastening interface to another structure and a second part to isolate the third part from strain in the first part. Grooves are formed in the second part, the grooves being substantially straight and substantially parallel to the first substrate, the frame having at least one opening made in one of the grooves etched in the metal frame to locally adjust the bending stiffness of the metal frame.

Abstract: The present invention relates to an appliance for reading from and/or writing to optical recording media 1 having a first laser diode LD1 for producing a first scanning beam AS1 at a first wavelength ?1 and having a second laser diode LD2 for producing a second scanning beam AS2 at a second wavelength ?2, with the scanning beams AS1, AS2 running along a common optical axis 9, scanning an information layer 6 on the recording medium 1 and falling on a single photodetector 8 in order to produce an information signal IS, with a beam combination element being arranged at one point on the optical axis 9. According to the invention, the beam combination element is a diffraction grating 12.

Abstract: In order to align the optical components of a projection apparatus (1), more particularly a rear projection apparatus of a projection wall, wherein the projection apparatus (1) comprises a light mixing rod (8), it is proposed to arrange an alignment deflecting mirror (19) in the illumination path of the imaging device (11) between the lamp (3) and the light mixing rod (8), wherein said alignment deflecting mirror (19) can be adjusted by means of servo motors (23).