Lens barrel includes: a rotating barrel which holds a first optical system and includes an adjustment member that can protrude from an inner circumferential surface; and a fixed barrel which holds a second optical system and includes a helical groove with which the adjustment member engages on an outer circumferential surface. The adjustment member can be located in a first or a second position with respect to the helical groove. Part of the adjustment member is in the helical groove in any of the first position and the second position. When in the first position, the adjustment member can slide along the helical groove, so the rotating barrel helically rotates relative to the fixed barrel, and when in the second position, the adjustment member is in contact with the helical groove, to prevent rotation of the rotating barrel with respect to the fixed barrel.

Disclosed is a magnifier for use by blind or low vision users. The magnifier includes a camera, such as a CMOS image sensor, that displays enlarged images upon a screen for easy viewing. The magnifier further includes a handle that is pivotally interconnected to a housing to allow for handheld use in a variety of different configurations.

According to an exemplary embodiment, a loupe attachment for glasses may be provided. The loupe attachment may include a loupe and a number of optical devices such as mirrors or prisms. The loupe and the optical devices may be connected to eyeglasses and be positioned as desired. The loupe and the optical device may be connected to the glasses on number of locations and the relative position of the loupe and optical devices in the trajectory of light may be modified. According to a second exemplary embodiment, loupes may be rigidly connected to eyeglasses and a number of optical elements may be rigidly or rotatably connected to the front end of the loupe so as to reflect the field of view situated at an angle from the loupe viewing direction.

A removable optical loupe that is mountable to headwear is provided. The inventive loupe is configured to clip on to the brim of a hat, or the bill of a cap or visor. Embodiments of the inventive loupe have a pivoting joint for positioning the lens of the optical loupe into and out of the line of sight when not in use. The lens of the inventive optical loupe is used for magnifying objects for inspection.

A binocular assembly includes a first optical pathway extending from a flat plate mirror to a first eyepiece assembly. The first optical pathway includes a first penta-right angle prism, a first optical focusing assembly located along a first focusing axis for focusing the first optical pathway from the first penta-right angle prism, and a first pair of right-angle prisms located along a first prism axis. The binocular assembly also includes a second optical pathway extending from the flat plate mirror to a second eyepiece assembly. The second optical pathway includes a second penta-right angle prism, a second optical focusing assembly located along a second focusing axis for focusing the second optical pathway from the second penta-right angle prism, and a second pair of right-angle prisms located along a second prism axis.

A bare diamond waist code mirror includes a seat body, an observation mechanism, a first focusing mechanism, a second focusing mechanism, and a diamond clip. A clamping mechanism is installed in the seat body, the observation mechanism includes a gearbox and a magnifying lens assembly, the gearbox is movably installed onto the seat body and is finely adjusted forward and backward through the first focusing mechanism, the magnifying lens assembly is movably installed on the gearbox and is finely adjusted vertically through the second focusing mechanism, the diamond clip is used for clipping a gem and is rotatably fixed on the clamping mechanism, the diamond clip is rotated, and the magnifying lens assembly is focused for observing a code of the gem. The diamond clip is rotated and adjusted by manual operation, and the code can be found by rotation of the gem and two-dimensional fine adjustment.

A supporting case for use with a smart device such as a smart phone to assist a visually impaired individual. The case has a lower surface for positioning over a viewing surface containing material to be viewed by the individual and a pocket configured and dimensioned to receive and support the smart device. The case includes one or both of a lifting system for lifting and holding the case hands-free at a pre-set distance above the material to be viewed and a distance viewing system to view material not underneath the case.

A magnifier is the only product of its kind that offers a completely hands-free scope option that requires little to no adjustment after set-up. This unprecedented product is uniquely designed with high-grade magnifying lenses that cover large viewing areas, possesses durable LED lights to deliver operational excellence and glass strength ranging from 2 to 3 magnification to help with clarity for the viewer during utilization.