Abstract:
In a near-eye optical display system comprising a waveguide and diffractive optical elements (DOEs) configured for in-coupling, exit pupil expansion, and out-coupling, a rainbow phenomenon manifested in the display may be removed or reduced using a polarizing filter at the front of the system so that real-world/stray light entering the system has a particular polarization state, for example TM-polarized. The polarizing filter is utilized in conjunction with a downstream out-coupling DOE that includes diffractive grating structures that are configured to enable sensitivity to an opposite polarization state, for example TE-polarized. An imager is configured to produce virtual-world images that also have a TE-polarized state. The polarization-sensitive out-coupling DOE diffracts the TE-polarized imaging beam out of the grating for display while the TM-polarized light from the real world and/or stray light passes through the grating without diffraction and thus cannot contribute to rainbows in the display.
Abstract:
1. Multifokales Fluoreszenzrastermikroskop 2.1. Fluoreszenzrastermikroskope (1 ) mit einem Beobachtungsstrahlengang (A) von einem Messvolumen bis zu einer Bildebene (BE), einem Strahlvereiniger (6) zur Ankopplung eines Beleuchtungssystems (11 ) und einer in der Bildebene (BE) angeordneten Blende (15) zeigen aufgrund der sequentiellen Abtastung einen langsamen Bildaufbau und belasten die Probe (P) durch ineffiziente Nutzung des Anregungslichts. Ein verbessertes Fluoreszenzrastermikroskop soll simultan Fluoreszenz aus unterschiedlichen Fokalebenen jeweils quasi-konfokal detektieren. 2.2. Das gelingt dadurch, dass der Beobachtungsstrahlengang (A) zwischen dem Strahlvereiniger (6) und der Bildebene (BE) eine erste diffraktive Optik (7) zur Aufspaltung von Lichtstrahlen in Strahlenbündel längs unterschiedlicher Beugungsordnungen, die den Lichtstrahlen eine von den anderen Beugungsordnungen verschiedene sphärische Phase aufprägt, eine zweite diffraktive Optik (13) zur Kompensation chromatischer Aberrationen der aufgespalteten Strahlenbündel und eine Sammeloptik (8) zur Fokussierung der aufgespalteten Strahlenbündel in die Bildebene (BE) umfasst. 2.3. Lebenswissenschaften
Abstract:
In one aspect the invention relates to an apparatus for analysing at least one measured optical profile of a machined workpiece, the apparatus comprising: an analysis module configured to: receive nominal optical profile data representing a desired profile of a workpiece as designed in a current design step; receive a plurality of measured optical profile data corresponding to a plurality of machined workpieces; for each measured optical profile data, determine a difference between the measured optical profile data and the nominal optical profile data; remove non-systematic machining errors from the determined difference, by determining an average of the plurality of determined differences; and output the determined average, corresponding to errors on the profile due to machining which are systematic machining errors, to a design module, in order to enable the design module to take into account the systematic machining errors in a further design step of the desired workpiece.
Abstract:
An optical magnifier has two light transmissive substrates with lenses on either side of each substrate and wherein the arrays of lenses are aligned such that an array of afocal optical magnifiers is produced. One of the arrays forming the array of afocal magnifiers has positive lenses and one of the arrays forming the array of afocal magnifiers has negative lenses. Two arrays of afocal magnifiers are combined to form a pair of magnifying glasses.