A solid immersion lens holder includes a first member having a first opening disposing a spherical face portion therein so that a part of the spherical face portion protrudes toward an objective lens side and a second member having a second opening disposing a contact portion therein so that a contact face protrudes toward a side opposite to the objective lens side. The first member includes three protrusion portions extending from an inner face of the first opening toward a center of the first opening and configured to be contactable with the spherical face portion.

This invention minimizes the needed space for a changer device for optical elements which can be mounted in front or in the back or on either fork side of telescopes. It implements a design whose profile is circular and centrosymmetric and gravitanionally neutral in respect to the path of light of the surrounding optical devices as well as an optimized mechanical depth. This is achieved by moving the centrosymmetrically arranged optical elements individually into the optical path i.e. the central opening of the changing device in contrary to prior art designs wherein the optical elements are mounted on a revolving disk whose axis of rotation is not congruent with the optical axis. The invention minimizes the obstructing area and shape of the changing device as well as the gravitational stress on surrounding structures by incorporating a design with minimal space requirements.

A microscope apparatus includes a base, a support disposed upright on the base, and an objective lens unit supported by the support and including an objective lens holder that holds an objective lens. The objective lens unit includes a drive source that moves the objective lens holder up and down and a driver that transmits a drive force of the drive source to the objective lens holder.

A microscope apparatus includes a base, a support disposed upright on the base, and an objective lens unit supported by the support and including an objective lens holder that holds an objective lens. The objective lens unit includes a drive source that moves the objective lens holder up and down and a driver that transmits a drive force of the drive source to the objective lens holder.

A turret comprises a turret screw, cam pin chassis, stop ring, and turret cap. The cam pin chassis has a cam pin extending from the chassis parallel with the axis and is linear moveable within the chassis. The stop ring has a first surface and a second surface comprising a spiral groove terminating at first and second stop surfaces. The cam pin engages the spiral groove. The screw extends through central bores of each of the turret cap, stop ring, and cam pin chassis such that they have a common rotational axis. A rotational limit of the turret is defined by one of the first and second stop.

A turret comprises a turret screw, cam pin chassis, stop ring, and turret cap. The cam pin chassis has a cam pin extending from the chassis parallel with the axis and is linear moveable within the chassis. The stop ring has a first surface and a second surface comprising a spiral groove terminating at first and second stop surfaces. The cam pin engages the spiral groove. The screw extends through central bores of each of the turret cap, stop ring, and cam pin chassis such that they have a common rotational axis. A rotational limit of the turret is defined by one of the first and second stop.

An image relay device that projects laser light representing an image emitted from a projection device onto the retina is provided. The image relay device includes a projection device, a first optical member, and a second optical member. The projection device includes a light source configured to emit laser light and a scan unit configured to scan the laser light based on image data. The first optical member receives an image light from the projection device and converts the image light which is a parallel light, to light beams of convergent light. The second optical member converts the light beams output from the first optical member into parallel light.

An image relay device that projects laser light representing an image emitted from a projection device onto the retina is provided. The image relay device includes a projection device, a first optical member, and a second optical member. The projection device includes a light source configured to emit laser light and a scan unit configured to scan the laser light based on image data. The first optical member receives an image light from the projection device and converts the image light which is a parallel light, to light beams of convergent light. The second optical member converts the light beams output from the first optical member into parallel light.

Universal electronic exchange system, especially for coupling to telescopes or similar, which includes an automated rotary device provided with a revolver-type rotary plate provided with a plurality of tubular members with holders for respective optical devices, an electric motor connected to the revolver-type rotary plate for transmission of a rotary movement thereto, an electronic unit for tubular-member selection, wherein the electronic unit is made and arranged to receive a selection signal indicative of a tubular member to be used, wherein the selection signal is used for controlling rotation and stopping of the revolver-type rotary plate, process a speed, angular path of rotation and stopping position of the tubular member to be used, and send a command signal to the electric motor of the revolver-type rotary plate for positioning and aligning the tubular member to be used with the optical axis.

Universal electronic exchange system, especially for coupling to telescopes or similar, which includes an automated rotary device provided with a revolver-type rotary plate provided with a plurality of tubular members with holders for respective optical devices, an electric motor connected to the revolver-type rotary plate for transmission of a rotary movement thereto, an electronic unit for tubular-member selection, wherein the electronic unit is made and arranged to receive a selection signal indicative of a tubular member to be used, wherein the selection signal is used for controlling rotation and stopping of the revolver-type rotary plate, process a speed, angular path of rotation and stopping position of the tubular member to be used, and send a command signal to the electric motor of the revolver-type rotary plate for positioning and aligning the tubular member to be used with the optical axis.