Zygo Corporation

Visionrx, Inc.

Visionrx.com, Inc.

Bruce E Truax

Jeffrey L Stewart

Robert E Maloney

Andrew D Meigs

Robert K Maloney

Tyler Steele

Xavier M Colonna De Lega

Justin Turner

Stephen L Mielke

Disclosed is a variable-zoom imaging apparatus that includes: i) imaging optics configured to form an image in an imaging area of an object positioned in an object area; ii) an adjustable aperture stop to adjustably set a numerical aperture NA for the image formed by the imaging optics; iii) an electronic detector comprising an array of detector elements positioned in the imaging area to detect the image; and iv) image processing circuitry coupled to the electronic detector to produce a digital representation of the image based on signals from at least some of the detector elements. The image processing circuitry produces the digital representation with a different magnification of the object m for each of a plurality of different numerical apertures for the image set by the adjustable aperture stop.

Variable-zoom imaging apparatus

Determining spatial information about a part includes positioning the part in a fixture having two reference surfaces, where the part is positioned between the two reference surfaces, imaging the two reference surfaces and opposing surfaces of the part to different locations of a multi-element detector, simultaneously acquiring images of the opposing sides of the part and the two reference surfaces using the multi-element detector, and determining spatial information about the part based on the simultaneously acquired images.

Object thickness and surface profile measurements

A technique for evaluating the topography of a cornea is disclosed, which utilizes a virtual image/object of a keratoscope pattern. The disclosed topography system includes a structured light source to create the keratoscope pattern or another diagnostic pattern, an optical assembly to focus the created pattern upon or behind the cornea, and for capturing the image reflected off the patient's eye and directing the reflected image toward an imaging system for processing. Light emitted by the light source is preferably not in the visible range, to minimize discomfort to the patient. Since the topography is evaluated with a projected virtual image, there is no nose or brow shadow, thereby allowing better corneal coverage. The optical system includes an aperture stop which is preferably conjugate with a point behind the corneal surface approximating the center of a normal cornea. Thus, wide angle capture is achieved as reflected rays reaching the imaging system appear as if they originated at the center of the cornea. A pupil detection mechanism is disclosed which is performed independently of the diagnostic pattern illumination, thereby facilitating pupil detection. In an alternate embodiment, the diagnostic pattern is generated using a variable light pattern generator, which provides flexibility in selecting target images to achieve various diagnostic abilities. The disclosed topography system may be used as a visual field measuring device, a perimeter, or an instrument for visualizing abnormalities in the eye's tear film.

Apparatus for visualizing the eye's tear film

A technique for evaluating the topography of a cornea in which a virtual object of a keratoscope pattern isured. The topography system includes a structured light source to create the keratoscope pattern or another diagnostic pattern, an optical assembly to focus the created pattern upon or behind the cornea, and for capturing the image reflected off the patient's eye and directing the reflected image toward an imaging system for processing. Light emitted by the light source is preferably not in the visible range, to minimize discomfort to the patient. Since the topography is evaluated with a projected virtual image, there is no nose or brow shadow, thereby allowing better corneal coverage. The optical system includes an aperture stop which is preferably conjugate with a point behind the corneal surface approximating the center of a normal cornea. Thus, wide angle capture is achieved as reflected rays reaching the imaging system appear as if they originated at the center of the cornea. A pupil detection mechanism is disclosed which is performed independently of the diagnostic pattern illumination, thereby facilitating pupil detection. In an alternate embodiment, the diagnostic pattern is generated using a variable light pattern generator, which provides flexibility in selecting target images to achieve various diagnostic abilities. The topography system may be reconfigured to serve as a visual field measuring device, or a perimeter.

Method and apparatus for measuring properties of the eye using an

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Southington, CT, United States of America

Bruce E Truax