Abstract: The present technology includes a color changeable indicator that changes color upon exposure of the indicator to high pressure and comprises at least one reagent releasing layer, a transition layer disposed on the reagent releasing layer, a color changeable layer disposed on the transition layer, and a non-porous protectant encompassing the reagent releasing layer, the transition layer and the color changeable layer. An additional reagent releasing layer can be located between the transition layer and the color changeable layer. The indicators provide simple, reliable, and cost effective detection means for detecting whether a product has been exposed to high pressure, e.g. high pressure pasteurization, and may find use in applications such as food and beverage processing and/or packaging and medical applications.

Abstract: Color changeable materials can be incorporated into adhesive materials while maintaining the efficacy and stability of the indicator. The indicators provide simple, reliable, and cost effective detection means for detecting ammonia and carbon dioxide, and may find use in applications such as food packaging and medical applications.

Abstract: The present technology includes a color changeable indicator that changes color upon exposure of the indicator to high pressure and comprises at least one reagent releasing layer, a transition layer disposed on the reagent releasing layer, a color changeable layer disposed on the transition layer, and a non-porous protectant encompassing the reagent releasing layer, the transition layer and the color changeable layer. An additional reagent releasing layer can be located between the transition layer and the color changeable layer. The indicators provide simple, reliable, and cost effective detection means for detecting whether a product has been exposed to high pressure, e.g. high pressure pasteurization, and may find use in applications such as food and beverage processing and/or packaging and medical applications.

Abstract: Color changeable materials can be incorporated into adhesive materials while maintaining the efficacy and stability of the indicator. The indicators provide simple, reliable, and cost effective detection means for detecting ammonia and carbon dioxide, and may find use in applications such as food packaging and medical applications.

Abstract: Color changeable indicator particles having a meltable, particulate organic core, and at least one color changeable indicator coated on the particulate organic core. Color changeable indicator particles can be incorporated into composite polymer materials while maintaining the efficacy and stability of the indicator. The indicators provide simple, reliable, and cost effective detection means for detecting ammonia and carbon dioxide, and may find use in applications such as food packaging and medical applications.

Abstract: A multimodal biometric identification system captures and processes images of both the iris and the retina for biometric identification. Another multimodal ocular system captures and processes images of the iris and/or the from both eyes of a subject. Biometrics based on data provided by these systems are more accurate and robust than using biometrics that include data from only the iris or only the retina from a single eye. An exemplary embodiment emits photons to the iris and the retina of both eyes, an iris image sensor that captures an image of the iris when the iris reflects the emitted light, a retina image sensor that captures an image of the retina when the retina reflects the emitted light, and a controller that controls the iris and the retina illumination sources, where the captured image of the iris and the captured image of the retina contain biometric data.

Abstract: A system and method for excitation of photosensitizers is configured to provide desired illumination on targeted eye tissue. The excitation system includes an optical module that generates illumination and a controller to power the optical module and control the shape, intensity or energy level, and duration of the illumination. The optical module includes a contact portion for interfacing with the eye, a treatment beam portion including a light emitter array to generate shaped light patterns and optics to focus the light patterns onto the eye, and a visualization portion to provide visual feedback of treatment through a visualization interface coupled with a microscope. A typical treatment involves the optical module being placed on a diseased eye of a patient by a clinician to project illumination on a diseased portion of the eye. The clinician typically views the eye through the microscope and the optical module during treatment.

Abstract: An ophthalmic lens with high definition, wide field of view and high magnification has, in one embodiment, a contact lens, an intermediate field lens and an image lens wherein a real image is formed inside the field lens. At least two of the lenses contribute to the magnification and three surfaces of the ophthalmic lens are aspheric to provide a better defined image. The ophthalmic lens is made disposable with high quality plastic lenses and a plastic holder. A portion of the holder changes appearance in response to change in environment to indicate that the disposable lens has been used.

Abstract: A method and system generates correlated biometric information by capturing an image of a retinal vessel pattern and simultaneously capturing an image of an iris minutia pattern. Retinal biometric data and iris biometric data are generated from the images. The retinal biometric data and the iris biometric data are then combined or linked to maintain the correlation between the two biometrics.

Abstract: A system for capturing an image of the retina includes an alignment system that aligns the eye along a predetermined axis of the system and at a predetermined distance from the system to illuminate a predetermined area of the retina and to capture an image thereof. The predetermined area of the retina includes the optic disk. The system includes a non-scanned illumination source of red and green light symmetric aspheric lens for a high quality and high contrast image.

Abstract: An ophthalmic lens with high definition, wide field of view and high magnification has, in one embodiment, a contact lens, an intermediate field lens and an image lens wherein a real image is formed inside the field lens. At least two of the lenses contribute to the magnification and three surfaces of the ophthalmic lens are aspheric to provide a better defined image. The ophthalmic lens is made disposable with high quality plastic lenses and a plastic holder. A portion of the holder changes appearance in response to change in environment to indicate that the disposable lens has been used.

Abstract: A system and method for excitation of photosensitizers is configured to provide desired illumination on targeted eye tissue. The excitation system includes an optical module that generates illumination and a controller to power the optical module and control the shape, intensity or energy level, and duration of the illumination. The optical module includes a contact portion for interfacing with the eye, a treatment beam portion including a light emitter array to generate shaped light patterns and optics to focus the light patterns onto the eye, and a visualization portion to provide visual feedback of treatment through a visualization interface coupled with a microscope. A typical treatment involves the optical module being placed on a diseased eye of a patient by a clinician to project illumination on a diseased portion of the eye. The clinician typically views the eye through the microscope and the optical module during treatment.

Abstract: An ophthalmic lens with high definition, wide field of view and high magnification has, in one embodiment, a contact lens, an intermediate field lens and an image lens wherein a real image is formed inside the field lens. At least two of the lenses contribute to the magnification and three surfaces of the ophthalmic lens are aspheric to provide a better defined image. The ophthalmic lens is made disposable with high quality plastic lenses and a plastic holder. A portion of the holder changes appearance in response to change in environment to indicate that the disposable lens has been used.

Abstract: A system for capturing an image of the retina includes an alignment system that aligns the eye along a predetermined axis of the system and at a predetermined distance from the system to illuminate a predetermined area of the retina and to capture an image thereof. The predetermined area of the retina includes the optic disk. The system includes a non-scanned illumination source of red and green light symmetric aspheric lens for a high quality and high contrast image.

Abstract: An optical system is shown for use with an image source to provide an enlarged virtual image with minimal geometric distortion. The optical system is suitable for generating a virtual image of text information in small font sizes, such as 8 point font or 10 point font, where the small font size text can be readily discerned. The optical system includes a prism having positive power wherein the total power is distributed among the prism's optical surfaces in a balanced manner and wherein the power across each surface is balanced as well. The prism employs a combination of rotationally asymmetric aspheric surfaces and a rotationally symmetric aspheric reflector so as to provide an extremely high quality virtual image across the entire width thereof, i.e. in the edge or peripheral portion of the image as well as in the central portion of the virtual image.

Abstract: A miniature display system uses a reflective micro-display that reflects light perpendicular to the surface of the display to generate an image. Light from an off-axis light source is polarized and reflected by a prism to provide on-axis illumination light for the display. The prism uses total internal reflection and/or a polarizer as a beam splitting surface so as to increase the brightness of the image generated by the display. The optical system provides a virtual image with a large field of view so that the small display system can be used in portable, hand-held or head mounted systems to display a large amount of information to the user.

Abstract: A fiber optic display sign has an optical system with enhanced light efficiency so that the display system is suitable for outdoor use. A number of fiber optics have light receiving ends arranged in a compact bundle for receiving an image from an image generator, the fiber optics coupling the image to the output ends thereof for display. An array of lenses is positioned adjacent the output ends of the fiber optics for directing or aiming the light from the fiber optics to control the viewing angle of the image displayed. The array of lenses may be fixed with respect to the output ends of the fiber optics or the lens array may be movable with respect thereto so as to vary the viewing angle. The image generator employs a light source formed of a densely packed array of white light emitting diodes to provide enhanced brightness.

Abstract: A miniature microscope is extremely small, fitting in a palm of a user's hand while providing powerful magnification and enhanced brightness so that the details of an object which cannot be resolved by an unaided eye can be easily seen. The microscope includes a housing have a holder for supporting an object to be viewed. At least one light source is position in the housing off-axis with respect to the object to be viewed. A first prism includes a first prism surface for reflecting light from the light source to a beam splitter surface wherein the beam splitter surface reflects light from the first prism surface to the object to be viewed. The beam splitter surface also passes light reflected from the object therethrough to a second prism. The second prism is positioned with respect to the first prism to provide refraction correction.

Abstract: A miniature display system uses a reflective micro-display that reflects light perpendicular to the surface of the display to generate an image. Light from an off-axis light source is polarized and reflected by a prism to provide on-axis illumination light for the display. The prism uses total internal reflection and/or a polarizer as a beam splitting surface so as to increase the brightness of the image generated by the display. The optical system provides a virtual image with a large field of view so that the small display system can be used in portable, hand-held or head mounted systems to display a large amount of information to the user.

Abstract: The system of the present invention allows the interior of the eye to be viewed and simultaneously treated with a laser without the use of an optic in contact with the eye. The system scans illumination light into the eye so that the interior of the eye can be observed and includes an integral treatment laser that can be directed to a desired position in the interior of the eye including the fundus. Light reflected from the patient's eye and received by the system may be observed directly by the physician via an eyepiece lens. In a preferred embodiment, however, the reflected light is applied to an image detector that is coupled to a display for displaying an image of the interior of the patient's eye. Because the physician can view the interior of the eye via the display during treatment, unwanted reflections of the treatment laser to the physician's eye via the viewing system are prevented.