METHOD, APPARATUS, AND COMPUTER-READABLE MEDIUM FOR SWITCHING OPTICAL PATHS

    公开(公告)号:US20170168289A1

    公开(公告)日:2017-06-15

    申请号:US14966349

    申请日:2015-12-11

    发明人: Jozef Sofka

    IPC分类号: G02B26/08 G02B21/16

    摘要: Presented is a method, apparatus, and computer-readable medium for selectively switching optical paths. The apparatus includes a directing mirror for redirecting light from an incoming path to one of a plurality of input paths and redirecting the light from one of a plurality of output paths to an outgoing path, and a plurality of input mirrors, each one of the plurality of input mirrors operable for redirecting the light from one of the plurality of input paths to one of a plurality of transition paths. The apparatus includes a plurality of light modifying elements, each one of the light modifying elements in a corresponding transition path and a plurality of output mirrors, each one of the plurality of output mirrors operable for redirecting the light from one of the plurality of transition paths to one of a plurality of output paths.

    Illumination system of a microlithographic projection exposure apparatus

    公开(公告)号:US09671699B2

    公开(公告)日:2017-06-06

    申请号:US14632430

    申请日:2015-02-26

    发明人: Michael Patra

    摘要: An illumination system of a microlithographic projection exposure apparatus comprises an optical integrator, which includes a first optical raster plate and a second optical raster plate. The first second optical raster plate comprising an array of first lenses having, along a reference direction, a first focal length f1, and the second optical raster plate comprises an array of second lenses having, along the reference direction, a second focal length f2. The vertices of the first lenses and vertices of the second lenses are spaced apart by a distance d that is greater than the second focal length f2 so that d>1.01·f2. This ensures that laser pointing or another transient variation of the illumination of the optical integrator does not adversely affect the spatial irradiance distribution in a plane which is illuminated by the optical integrator.

    DIFFRACTION GRATING FOR WAVELENGTH SELECTION IN LINE-SCAN SLO

    公开(公告)号:US20170127940A1

    公开(公告)日:2017-05-11

    申请号:US15318203

    申请日:2015-06-11

    摘要: In line-scan scanning laser ophthalmoscopy (SLO) a narrowband of wavelengths is required. For greater flexibility the frequencies of this narrowband should be selectable. This is possible using a broadband tunable single mode source, but such a solution is expensive. A system is provided in which an extended broadband source is used. Light from the extended source passes to a diffraction grating, which introduces a wavelength dependent angular separation when reflecting the light. By rotating the diffraction grating, only light of a selectable narrowband passes through a fixed output slit for use by the line-scan SLO system. Alternatively, the diffraction grating can be fixed and a rotatable mirror lying between the diffraction grating and the output slit can be used to select the wavelengths reaching the line-scan SLO system.

    Facet mirror device
    119.
    发明授权

    公开(公告)号:US09645388B2

    公开(公告)日:2017-05-09

    申请号:US14047192

    申请日:2013-10-07

    IPC分类号: G02B26/08 G02B7/182 G03F7/20

    摘要: There is provided a facet mirror device comprising a facet element and a support unit, the support unit supporting the facet element. The support unit comprises a first support element and a second support element, the second support element being connected to the facet element to support the facet element. The first support element is connected to the second support element to support the second support element, the first support element being connected to the second support element via at least one flexure unit, the flexure unit comprising at least one flexure.