JPS5872910A - Discriminating device for information of object lens of optical machine - Google Patents

Abstract

PURPOSE:To display effectively information of a used object lens in an observation visual field, by providing a bar code on the end face of a revolver attaching screw part of the object lens and scanning information of the object lens around the optical axis in the circumferential direction. CONSTITUTION:On the end face of a revolver attaching screw part of each object lens, information 4 for this object lens is recorded with a radial bar code on all of the circumference of this end face. When a rotary light shielding plate 6 having an eccentric aperture 6a is rotated, the luminous flux passing through the eccentric aperture 6a scans information 4 around the optical axis in the circumferential direction, and the luminous flux reflected from information 4 is incident to a photodetector 8 through a condenser lens 7, and this luminous flux is modulated in accordance with the bar code of information 4, and therefore, the output of the photodetector 8 is fluctuated. This output fluctuation is processed in a detecting device 9 to detect various information of the object lens.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an objective lens discriminating device that automatically detects information about the objective lens being used in an optical machine such as a microscope that is equipped with a plurality of objective lenses to be selectively used.

It would be convenient if information such as the magnification of the lens used could be displayed within the observation field of the microscope, and it would be particularly advantageous if the total magnification etc. could be displayed when systematizing the microscope end. For this purpose, a mechanism for detecting information such as the magnification, field number, and numerical aperture of the eyepiece and/or objective lens is required. Since the objective lens is determined by detecting the presence or absence of one color of reflected light, the amount of information is small and it is not suitable for displaying information about the objective lens used within the observation field of view.

Therefore, the present invention aims to provide an objective lens discrimination device capable of detecting a sufficient amount of information regarding the objective lens used. To explain this by way of example, 1 is a microscope main body, 2 is a lens rotatably attached to the microscope main body 1, and a plurality of objective lenses 3, 3', . . . are attached thereto.

The end face of the railper mounting screw part of each objective lens is equipped with circumferential information 4 recorded on the entire circumference by a radial bar code (see Figure 3) corresponding to each objective lens. . 5 is a light source that emits a parallel light beam; 6 is a rotating light shielding plate having an eccentric aperture 6a; when rotated by an appropriate drive mechanism (not shown), the light beam passing through the eccentric aperture 6a transforms the information 4 of the objective lens 3 into a circle; It scans around the optical axis in the circumferential direction.

7 is a condenser lens that collects the light beam reflected on the information 4 onto the light receiving element 8, and 9 is a detection device.

According to the embodiment of the present invention configured as described above, when the rotating light shielding plate 6 is rotated, the light beam passing through the eccentric aperture 6a scans the information 4 in the circumferential direction around the optical axis. The light beam reflected on 4 passes through a condenser lens 7 to a light receiving element 8.
However, since this light flux is modulated according to the Percow 1 of the information 4, the output of the light receiving element 8 fluctuates.

By processing this output fluctuation with the detection device 9, various information about the objective lens can be detected.

FIG. 4 shows another embodiment according to the present invention, in which 10 is a light source that emits a parallel light beam, and 11 is a reflective portion 11a on the periphery.
When the rotating reflector is rotated by a drive mechanism (not shown), the light beam reflected by the reflector 11a scans the information 4 of the objective lens 3 in the circumferential direction around the optical axis. ing. The rest of the structure is the same as that of the embodiment shown in FIG. 2, and therefore the operation is also the same.

Note that the light source that emits a parallel light beam may be composed of a light emitter and a collimator lens. Moreover, instead of the light source 5 and rotating light shielding plate 6 in FIG. 2 or the light source 10 and rotating reflector 11 in the 41st screen 1, the minute light emitter 1 shown in FIG.
2 and a lens 13 disposed in front of it.
It is also possible to use 4. Furthermore, in the embodiment shown in FIG. 2, a rotating light shielding plate 6' indicated by a dotted line can be used instead of the rotating light shielding plate 6, but in this case, the information 4
It is desirable that the reflection at is a specular reflection. This can also be applied to the embodiment of FIG. 4, in which case a fixed reflector is arranged at this position instead of the rotating reflector 11.

Here, the rotation of the rotating light-shielding plate 62 and the rotation of the rotating reflector 11, etc.

As a drive device for the member, for example, a drive mechanism may be used in which teeth are carved around the rotating member and the teeth are meshed with a gear wheel rotated by a motor.

As described above, according to the present invention, the information of the objective lens is scanned in the circumferential direction around the optical axis by the bar code provided on the end face of the threaded part for attaching the resolver of the objective lens. Correct information can be obtained regardless of the stop position when attached to the resolver, and since the information is recorded in the circumferential direction, there is a large amount of information, and the information of the objective lens used can be displayed within the observation field. Effective.

[Brief explanation of the drawing]

Fig. 1 is an overall view of the microscope, Fig. 2 is a view showing one embodiment of the present invention, Fig. 3 is a partial perspective view showing details of the embodiment of Fig. 2, and Fig. 4 is a diagram showing a second embodiment of the present invention. FIG. 5 is a diagram showing a rotary plate according to another embodiment of the present invention. ■...Microscope body, 2...Resolver, 3.3'.
...Objective lens, 4...Information, 5.10...Light source,
6: Rotating light shielding plate, 7 Condensing lens, 8 Light receiving element, 9 Detecting device, 11 Rotating reflector, 1
2... Luminous body, 13... Lens, 14... Rotating plate. Agent Patent Attorney Yasushi Shinohara - Figure 4 Figure 5

Claims (1)

[Claims] In an optical machine equipped with a plurality of objective lenses to be selectively used, a light modulator encoded with information about each objective lens is provided on the end face of a mounting screw portion of each objective lens; an irradiation device that irradiates a light beam onto a light modulator; a scanning device that causes light emitted from the irradiation device to scan the light modulator in a circumferential direction around an optical axis; 1. An objective lens discrimination device for an optical machine, comprising: a light receiving device that receives light from the light receiving device; and a detecting device that processes an output signal from the light receiving device to detect information about the objective lens.