JPH06273677A - Polarizing and phase difference plates built in scope for monitor - Google Patents

Abstract

PURPOSE:To attach optical elements, which bring about linear polarization and a phase difference, to the incident light side from a light source in various scopes by incorporating a polarizing plate and a phase difference plate or the like before and after a lens system in various scopes. CONSTITUTION:With respect to a conventional barrel separation type microscope or an image pickup and projection lens which magnifies and observes a sample 1, a polarizing and phase part 9 is attached to a loupe part 10. In the polarizing and phase part 9, light from the sample 1 indicated by a dotted line is condensed on a compensating plate 3 and/or a phase plate 4 by a condenser lens 2 and has the phase modulated. This luminous flux is condensed on a slit 6 in the loupe part 10 and passes a magnifying or telephoto lens system 7 after passing a polarizing plate 5. Thereafter, the image is formed on a detector 8 for image pickup like a CCD, and an enlarged image or the like is projected on a monitor television or the like. In this case, a distant object can be observed when the loupe part 10 for telephoto is used.

Description

Detailed Description of the Invention

[0001]

[Industrial field of application] When displaying a magnified image of an object on a TV screen, etc., a microscope that is separated from the sample stage and does not require a lens barrel, or various scopes that use imaging, projection lenses, etc. Although a method of taking in a magnified image has been used, the present invention relates to an optical observation scope which has a newly introduced polarization and phase difference and is widely applicable to the industrial field.

[0002]

2. Description of the Related Art In conventional observation of crystals, minerals, etc., there is a method of observing with a polarizing microscope in which a lens barrel and a stage for a sample stand are integrated with a lens system. Operations such as fine adjustment of the focus of are troublesome.

On the other hand, unlike the above method, in a microscope of a system in which the lens barrel is not used and the objective lens is separated from the sample stage, the objective lens system can be easily handheld, and a projection imaging lens or the like is used. Even for various scopes to be observed, since the long focus lens system is moved up and down by the column to change the focus and magnification, operation is simple without contact. Either way,
High magnification images can be magnified and observed on the screen through CCD and optical fiber.

However, none of these lens-barrel-separated microscopes and imaging / projection lenses are equipped with an optical observation means such as using polarized light, so that they can be used as a polarizing microscope and can be used in all other directions of polarization and phase difference. It was not effectively used for applied technology.

[0005]

Linear microscope or phase difference is generated on the incident light side from a light source in a lens-barrel-separated type microscope using an image sensing element or the like and various scopes using an imaging projection lens. I have come up with a method of attaching an optical element that can be used. This allows for polarization,
It is an object of the present invention to provide an optical scope that is easy to operate even at a high magnification, unlike the conventional microscope method in optical application fields such as phase.

[0006]

In order to achieve the above object, in addition to a lens system, a polarizing plate, a retardation plate and the like according to the present invention are provided before and after a lens system in various scopes such as a microscope and an imaging projection lens. I devised a united device.

The polarizing plate is free to rotate in order to make the polarization effect effective. In addition, these are either a method that is incorporated with a lens system, or a device that has functionality so that it can be easily attached to and detached from a lens holder by an adapter method.

[0008]

In the optical system configured as described above, for example, even if a polarizing plate is used alone, light from an object transmits linearly polarized light or partially polarized light after passing through it, so diffused reflection is eliminated.

Further, one or both of a polarizing plate and a retardation plate are incorporated in the lens barrel-separated microscope and / or the imaging projection lens, and at the same time, the polarizing plate and the retardation plate are also arranged on the light source side in front of the object sample. If it is positioned, the action of polarization on the incident light,
Since the phase changes, linearly polarized light suitable for observing minerals can be extracted based on the principle of optics. It can also have a function as a polarization microscope.

[0010]

EXAMPLES Examples will be described with reference to the drawings. In a conventional lens-barrel-separated microscope or imaging / projection lens for magnifying and observing the sample 1 in FIG. 1, the polarization / phase part 9 according to the present invention is attached to the loupe part 10. The attachment may be a fitting connection with a screw or the like, or may be a product obtained by incorporating these into a cylinder such as a scope at the time of manufacturing.

In the polarization / phase part 9, the light beam shown by the dotted line from the sample 1 is condensed by the condenser lens 2 on the compensating plate 3 and / or the phase plate 4 to be phase-modulated.
Further, the light flux after passing through the polarizing plate 5 is condensed on the slit 6 in the loupe 10 and passes through the lens system 7 for magnifying or for telephoto. After that, an image is formed on the image sensing element 8 such as a CCD, and a magnified image or the like is displayed on a monitor television or the like.

If the magnifying lens 10 is used for telephoto, a distant object can be observed. In order to remove diffuse reflection from an object or to observe elliptically polarized light from the outside world, the compensator 3 is removed, a quarter-wave plate is used as the phase plate 4, and the polarizing plate 5 is rotated to adjust the orientation of the polarizer. The method of making it possible is considered. In some cases, the compensating plate 3 and the phase plate 4 are both removed and only the polarizing plate 5 is used. These can be used in various ways in addition to the conventional applications of the polarization microscope.

FIG. 2 shows an example of using the present invention as a polarization microscope in combination with an apparatus provided on the light source side of the sample. Before reaching the sample 1, the incident light from the light source 11 has a phase according to the principle of a normal polarization microscope,
The condenser lens 12 inside the polarization unit 16 condenses and passes through the polarizing plate 13 as a polarizer and the phase plate 14. Further, it is diffused and projected onto the sample 1 on the gantry 17 by the projection lens 15.

In this usage as a polarization microscope, the polarizing plate 13 and the polarizing plate 5 used as an analyzer must be orthogonal to each other, and the phase plate 4 and the phase plate 14 are quarter-wave plates. In addition, when used as a photoelasticity observation apparatus, both half-wave plates are used as the above retardation plates.

[0015]

Since the present invention is constructed as described above, it produces the effects described below.

Fine adjustment of the objective lens, which has been troublesome in the past, is newly provided by adding a function of producing linearly polarized light, partially polarized light or a phase difference to the microscope of the lens barrel separation type or the scope of the projection imaging lens system. Since it becomes unnecessary, the photoelastic effect that can recognize the image of minerals or the distortion pattern of the object can be easily incorporated into the TV screen. In addition, a clear image from which irregular reflection is removed can be observed, and an epoch-making image can be obtained.

Therefore, in all fields of image observation, the effect of utilizing polarization and phase modulation is further increased, and I think that it can contribute to this.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a detection side of a scope having a polarizing plate and a phase plate attached.

FIG. 2 is a cross-sectional view of a light source side device, which is devised for sample observation with a polarizing plate and a phase plate attached.

[Explanation of symbols]

 1 Sample 2, 12 Condenser lens 3 Compensation plate 4, 14 Phase plate 5, 13 Polarizing plate 6 Slit 7 Lens system 8 Detection element 9, 16 Polarization, phase part 10 Loupe part 11 Light source 15 Projection lens 17 Frame

Claims (3)

[Claims] 1. An optical scope for projecting a magnified image of an object or the like on a monitor, a condenser lens system (2), a compensating plate (3), a phase plate (4), and a polarizing plate in a loupe part (10). A method in which the polarized light and the phase portion (9) composed of (5) are integrated to bring the incident light into a polarization effect and a phase modulation. 2. The polarization and phase section (16) comprising a polarizing plate (13) and a phase plate (14), which are installed on the light source side of the sample separately from the method according to claim 1. ), And projecting a phase-modulated image as a polarization microscope on a monitor, etc. 3. The method according to claim 2, wherein the retardation plate is changed and used for observing distortion of physical properties such as photoelasticity.