A portable modular unit for inspecting in a timepiece the presence of a lubricating agent, or of an epilame, having fluorescent markers, from an excitation luminous flux of white light. The modular unit includes an optical housing, forming a first module, a portable white light source (200) emitting an excitation luminous flux, forming a second module, a portable magnifying device, forming a third module. The optical housing includes a first mounting interface for removably mounting the portable white light source on the optical housing, the first mounting interface being configured so that the excitation luminous flux emitted by the portable white light source is directed in the direction of the excitation filter; and a second mounting interface for removably mounting the portable magnifying device on the optical housing, the second mounting interface being configured so that the magnifying device is opposite the inspection opening.

A portable modular unit for inspecting in a timepiece the presence of a lubricating agent, or of an epilame, having fluorescent markers, from an excitation luminous flux of white light. The modular unit includes an optical housing, forming a first module, a portable white light source (200) emitting an excitation luminous flux, forming a second module, a portable magnifying device, forming a third module. The optical housing includes a first mounting interface for removably mounting the portable white light source on the optical housing, the first mounting interface being configured so that the excitation luminous flux emitted by the portable white light source is directed in the direction of the excitation filter; and a second mounting interface for removably mounting the portable magnifying device on the optical housing, the second mounting interface being configured so that the magnifying device is opposite the inspection opening.

A conversion lens attachment structure includes a first magnetic body provided on a conversion lens device that includes a conversion lens, and a second magnetic body provided on a device main body that includes a master lens. The conversion lens device is attached to the device main body due to a first surface of the first magnetic body and a second surface of the second magnetic body being pulled toward each other, and the second magnetic body is provided such that a normal line of the second surface is not parallel to an optical axis of the master lens.

A reading aid for magnifying text includes a first frame. The first frame comprises an annular wall that extends from a top to a bottom. The bottom is open. A first lens is positioned in the top. A second lens is adjustably coupled to an interior of the annular wall. The second lens is parallel planarly positioned relative to the first lens. A power module is coupled to the first frame. A plurality of lights is coupled to an upper end of the first frame. The lights are operationally coupled to the power module. The second lens is adjustably positionable relative to the first lens to obtain a magnification level required by a user. The lights are configured to illuminate a printed item positioned beneath the first frame such that the printed item is readable by the user.

A user-wearable fluorescence based visualization system comprising a multi-light lamp assembly that provides for the selected output of light using multiple light emitting sources, wherein the outputted light may be tailored to generate response wavelength by the interaction of the emitted light and a tissue illuminated by the emitted light, through the process of fluorescence, and a viewing system that allows a practitioner view the fluorescent light generated by the tissue, and distinguish between healthy and diseased tissues.

A user-wearable fluorescence based visualization system comprising a multi-light lamp assembly that provides for the selected output of light using multiple light emitting sources, wherein the outputted light may be tailored to generate response wavelength by the interaction of the emitted light and a tissue illuminated by the emitted light, through the process of fluorescence, and a viewing system that allows a practitioner view the fluorescent light generated by the tissue, and distinguish between healthy and diseased tissues.

An optical module comprising: at least three lens elements, wherein the lens elements collectively set a numerical aperture NA, a field height FH, and a system effective focal length EFLsys for directing the light rays between first and second planes, wherein NA, FH, and EFLsys satisfy 0<NA<0.25 and 0<FH<(0.4).Math.(EFLsys); wherein first and second adjacent lens elements having effective focal lengths EFL1 and EFL2, respectively, satisfies (1.5).Math.(EFLsys)<EFL1<3.Math.(EFLsys) and (1.5).Math.(EFLsys)<EFL2<3.Math.(EFLsys); wherein an air-distance between the first and second lens elements A.sub.12 satisfies 0<A.sub.12<EFLsys; wherein a third lens element adjacent the second lens elements opposite the first lens element and having an effective focal length EFL3 satisfies (−20).Math.EFLsys<EFL3<(−1).Math.EFLsys; and wherein an air-distance between the second and third lens elements A.sub.23 satisfies 0<A.sub.23<EFLsys.

An optical module comprising: at least three lens elements, wherein the lens elements collectively set a numerical aperture NA, a field height FH, and a system effective focal length EFLsys for directing the light rays between first and second planes, wherein NA, FH, and EFLsys satisfy 0<NA<0.25 and 0<FH<(0.4).Math.(EFLsys); wherein first and second adjacent lens elements having effective focal lengths EFL1 and EFL2, respectively, satisfies (1.5).Math.(EFLsys)<EFL1<3.Math.(EFLsys) and (1.5).Math.(EFLsys)<EFL2<3.Math.(EFLsys); wherein an air-distance between the first and second lens elements A.sub.12 satisfies 0<A.sub.12<EFLsys; wherein a third lens element adjacent the second lens elements opposite the first lens element and having an effective focal length EFL3 satisfies (−20).Math.EFLsys<EFL3<(−1).Math.EFLsys; and wherein an air-distance between the second and third lens elements A.sub.23 satisfies 0<A.sub.23<EFLsys.

A color temperature adjustable and dimmable magnifier comprises: a housing, a magnifying lens, a plural set of light emitting members and a control member, the housing comprises a lens carrier and a grip connecting the lens carrier; the magnifying lens is set in the lens carrier; the plural set of light emitting members are set around the lens carrier, each set of the light emitting member includes a cold light source and a warm light source; and the control member connects each cold light source and each warm light source, the control member controls turning on and off cold light sources and warm light sources according to the external instructions received, and adjusts the brightness of cold light sources and warm light sources to combine into a plural color temperature. The color temperature adjustable and dimmable magnifier can meet the various needs of users for color temperature and brightness.

In one aspect, a user-wearable illumination assembly includes eyeglass frames and a headlamp removably coupled to the eyeglass frames. Electrical circuitry may be integrated with the eyeglass frames. The headlamp and the eyeglass frames have mounting structure that cooperate to removably support the headlamp thereon. A light source is disposed within the headlamp and electrical communication between the light source and the electrical circuitry of the eyeglass frames is provided by electrical contacts associated with the mounting structures of the headlamp and eyeglass frames. In another aspect, a user-wearable illumination assembly for use with eyeglass frames includes a clip assembly that is selectively removably couplable to a bridge portion of the eyeglass frames, and a headlamp coupled to the clip assembly. The illumination assembly further includes a battery that is selectively removably couplable to the eyeglass frames and at least one electrical conductor coupling the battery to the headlamp.