Carl Zeiss AG - Patentabteilung

The present invention relates to a spectacle lens comprising an anti-reflective coating, the anti-reflective reflective coating as defined in ISO 13666:2019(E), entry 3.18.3, said anti-reflective coating comprising a plurality of layers, said spectacle lens having, in an interval of angles of incidence, a residual reflectance colour in CIE 1976 L*a*b* colour space, the spectacle lens being characterized in that at an angle of incidence of 0°, positions of CIELAB a*,b* coordinates for said residual reflectance colour lie in a rectangular region in an a*,b* plane, said rectangular region in said a*,b* plane being defined by 2 ≤ a* ≤ 9.2 and 7 ≤ b* ≤ 16.8, in an interval of angles of incidence limited by an angle of incidence of > 0° and an angle of incidence of 75°, each position of CIELAB a*, b* coordinates for said residual reflectance colour, in said a*,b* plane, has a value D ≥ 0, with D = b* + 6.5 · a* + 6.5, the CIELAB a*,b* coordinates are determined with respect to a single surface of said spectacle lens comprising said anti-reflective coating.

The present invention relates to a spectacle lens comprising an anti-reflective coating, said anti-reflective coating being a single layer anti-reflective coating, said spectacle lens having a spectral reflectance of < 1.5% at an angle of incidence of 0° in a wavelength interval of from a wavelength λ₁ to a wavelength λ₂, the spectacle lens being characterized in thatsaid wavelength interval of from said wavelength λ₁ to said wavelength λ₂ extends over one of the following widths w, w = λ₂ - λ₁,- a width of at least 1200 nm,- a width of at least 1300 nm,- a width of at least 1400 nm,with 380 nm ≤ λ₁, λ₂ ≤ 2500 nm, λ₁ ≠ λ₂, λ₂ > λ₁.

The present invention is directed to a computer-implemented method for generating printing instructions for inkjet printing a spectacle lens, said printing instructions being based on a digital twin of said spectacle lens, said digital twin being sliced into a layer stack, the method comprising the steps:(i) positioning a volume element in a discrete x_m+1,y_m+1,z_m+1 ... x_n+1,y_n+1,z_n+1 position of a layer of said layer stack, based on a positioning of a volume element in a discrete x_m,y_m,z_m ... x_n,y_n,z_n position of an adjacent layer of said layer stack; or(ii) not positioning a volume element in a discrete x_m+1,y_m+1,z_m+1 ... x_n+1,y_n+1,z_n+1 position of a layer of said layer stack, based on a positioning of a volume element in a discrete x_m,y_m,z_m ... x_n,y_n,z_n position of an adjacent layer of said layer stack.

Systems and methods are provided for performing Doppler (phase-sensitive) optical coherence tomographic vibrometry measurements involving the vibrometric response of a rigid structure to an acoustic stimulus, such that the impact of speckle noise on a calculated vibrometric measure is reduced. Detected signals are processed to determine a depth range associated with the rigid structure, and to provide sampled time-dependent phase data encoded with the vibratory response of the rigid structure during application of the acoustic stimulus. The sampled time-dependent phase profile is processed to generate a vibrometric measure characterizing the rigid structure, based on non-uniformly-weighted contributions from one or more subregions within the depth region associated with the rigid structure (and optionally one or more time windows). The contribution from each subregion may be dependent on a depth-domain intensity measure associated with the subregion, where each subregion may be sufficiently small to encompass speckle-induced spatially-dependent changes.

An optical system comprising a distal lens assembly defining an optical exit axis; an optical beam combining element; an image sensor; an imaging lens assembly defining an imaging beam path between the optical beam combining element and the image sensor, the distal lens assembly and the imaging lens assembly configured such that imaging light scattered by a sample residing at a distal object plane is collected by the distal lens assembly and directed onto the image sensor by the imaging lens assembly according to an optical imaging beam path; an optical coherence tomography beam delivery assembly configured to deliver, from an optical coherence tomography subsystem, an optical coherence tomography sample arm beam onto the optical beam combining element such that the optical coherence tomography sample arm beam is directed through the distal lens assembly onto the sample, thereby defining an optical coherence tomography sample arm beam path, and such that reflected optical coherence tomography light is collected by the distal lens assembly and directed to the optical coherence tomography subsystem for detection, wherein the distal lens assembly and/or the imaging lens assembly and/or the optical coherence tomography beam delivery assembly comprises a variable focal length lens configured to variably adjust a distance between the distal lens assembly and the distal object plane along the optical exit axis, wherein a focal length of the variable focal length lens is variable within a predefined focal length range.

The disclosure relates to a nose cone (160) for a vibrometry measurement system. The nose cone comprises a cone body (165) having a base portion (210) and a top portion (220); the top portion (220) comprising a plurality of ports (230, 332, 334) on a top surface (225), wherein at least one light guiding element (144) is coupled to at least one of the plurality of ports (230, 332, 334). A speaker duct (336) configured to transmit an acoustic stimulus from a speaker (152); and a microphone duct (338) configured to relay an acoustic pressure to a microphone (154). The invention further relates to a vibrometry measurement system and a method for manufacturing a nose cone.

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