KR910009733B1 - Highly bright screen optical system for microscopic projector - Google Patents

Abstract

The system combining lens with reflecting screen, offers improvement of luminance and flatness of the screen image in projecting microscopic image on screen. The system has a reflecting screen surface (5) having the grain size of 200-2500# and reflectivity of 30-90%, covered with reflecting material such as aluminum, having outer spherical surface with curvature radius (R) more than twice as large as the screen diameter; a compensating/magnifying lens (6). The screen (5) is combined with an eye lens of the microscope.

Description

High Brightness Screen Optical System for Brown Rice Projector

1 is a cross-sectional view of the configuration of the present invention.

2 is a side cross-sectional view of the present invention.

3 is an explanatory diagram of an optical configuration of the present invention.

4 is an explanatory diagram for explaining the operation of the present invention.

5 is an exemplary embodiment of the present invention.

6 is an exemplary embodiment of the present invention 2.

7 is an application implementation of the present optical system.

* Explanation of symbols for the main parts of the drawings

1: appearance 2: barrel

3: correction lens 4: reflector

5: Reflective screen 6: Corrected magnifying lens

The present invention relates to a high-brightness screen optical system for a microscope projector for projecting and viewing a microscope image on a screen, in particular, a lens and a reflection screen are combined to obtain high brightness, multiplication effect, and flatness of the screen.

Conventional microscope screens are transmissive screens that are transmitted from the back side and viewed from the front side, so that the projected light is reduced and exposed to external light, so that the screen is very blurry, especially the higher magnification is difficult to observe.

However, the present invention focuses and reflects the microscope image incident by the correcting lens or the eyepiece onto a reflective screen having an optical curvature to increase the brightness more than twice and place the copper screen inside so as to prevent exposure to external light and to correct the magnifying lens. The magnification is increased and the screen is made flat so that the effect is not only brighter than 60Lux but also brighter than 60Lux. That is, the effect of 600 times can be magnified 2 times and will be described in detail below based on the drawings.

1 and 2 are structural explanatory diagrams of the present invention, in which a barrel (2) having a correction lens (3) mounted on the lower part of the outer box (1) in which optical reconstruction can be assembled is brought into contact with the upper surface portion. A reflecting screen 5 formed of aluminum deposition or an aluminum metal film is attached to the rear end of the reflecting mirror 4 attached at a downward angle, and the eyepiece or correction lens 3 is positioned at the front symmetrical position to form the entire structure. do.

However, in such a structure of the present invention, the optical component is important. That is, when the correction lens 3 in the downward portion is placed on the same optical axis line as the D line 3A point as shown in FIG. 3, the distance from the screen 5 is A and A = A ¹ + A ² and B is corrected. It is equal to the focal length of the magnifying lens 3, C is the distance between the copper lens and the screen 5, R ¹ is the front curvature radius of the dynamic correction magnification lens, R ² is the rear curvature radius, and R is the When the radius of curvature S is the surface of the copper screen and the screen diameter is E and the lens diameter is E ¹

The reason for this is that when the curvature is small compared to D, which should always be greater than 2R, the spherical surface of the screen is too strong and the surrounding and center focus of the image do not coincide.

In addition, the light incident on the screen 5 at the focal position F formed by the curvature R of the screen 5 is directly reflected as illustrated in FIG. 4A.

This is because when the screen is observed after the point F on the same line D, the front of the screen may be uniformly observed.

Therefore, in order to obtain such an action, it is the reason that 2 times the length of A is the radius of curvature R of the screen, and the correction lens 3A is positioned at the focal position F. In addition, the reason why the length of C is not set to be equal to or longer than B is that if C is longer than B, which is the focal length of the magnification correction lens 3, the image of the screen 5 falls out of the image. Is reduced. In addition, the R ¹ of the correction lens - reason for the radius of curvature or the radius of curvature of the weak + than R ^2, the different mutually the curvature radius of curvature of R ² with the power of + is a screen based on the observation position of 3A point Since the surface is concave spherical due to its curvature radius R for condensing efficiency, and the planarity of the image is concave spherical, the backside of the correction lens 3 is bent in proportion to the curved surface of the screen, thereby offsetting the time difference. This is to derive flatness.

On the other hand, even if the surface curvature of the screen is effectively formed as shown in FIG. 4B, the surface of S, which is the surface of the screen, is scattered in all directions when the surface reflectance is not effectively reduced, as well as the brightness is very low. This is because no light collection efficiency is generated.

In other words, the relationship between the scattering factor and the reflectance reflecting the brightness, which are the determining factors of the viewing angle, are inversely proportional to the scattering rate and the reflectance, the reflectance and the brightness are inversely proportional to each other, and the brightness and the scattering rate are inversely proportional to each other.

[Figure 1]

As shown in the diagram, the transmission screen has a scattering rate of 75% and a brightness of 25 GAIN. Even though the light penetrates the screen, a considerable amount of light is reflected back, reducing the brightness.

Therefore, the surface of the screen is composed of an aluminum vapor deposition surface or a reflective screen which obtains a required reflectance by adding or subtracting the particle size of the aluminum surface so that the incident light is reflected by the following method.

In other words, the reflectivity determination of the screen surface depends on the provided tablet, but here for the sake of understanding, for example, a matte surface scattered in all directions above 180 ° (or 360 °), generally based on the abrasive grain level of the surface, In general, 100 # -200 # (Mash) standards and surface polishing particles with high reflectivity efficiency such as mirrors are based on 2000 # -3000 # (Mash) standards.

매시가 된다. 따라서 60%=750매시가 된다.In this case, the surface granularity of 30% reflectivity is based on the planar particle size 200 # -2500 #.

It becomes hourly. So 60% = 750 mash.

When the reflectance is 30% -90% compared to the conventional see-through matt surface, the reflectivity is higher than the conventional screen, which is half transmitted and half reflected, as shown in FIG. 4C. Four times the brightness is increased. Of course, the upper limit of the reflectance is set at 90% because a slight scattering ratio is required to improve the image.

This will be described in detail in the embodiment based on the drawings. Figure 5 is an example of an embodiment to which the present invention is applied, which generally observes through light such as preparad or pathogen. Applied to the medical microscope, the structure is described as follows for better understanding.

The microscope 12 is placed in the upper part where the light source device 13 is placed inside the lower support frame 11, and the light of the light source device is focused on the condenser lens 14 to condense the center of the microscope stage 15 to preparad. Let (22) investigate.

The light source of the preparad 22 irradiated in this way is incident by the objective lenses 16 and 17 of the respective magnifications having the rotational shift function by the rotary frame 19 and the eyepiece 21 and the correction lens 2, respectively. Is focused and refracted by the lens, reflected by the reflector 4 to form an image, and the observer corrects and observes the image by the corrected magnifying lens 6.

로 한다.)The optical resources of the screen portion which is the subject matter of the present invention at this time are as follows. (ND = standard refractive index of the correcting lens (3), the formula to obtain the focal length (B)

I do it.)

Substituting this resource into the logic of the present invention described above, since A = 400m / m R = 800m / m, R-2A (formula 2) is established, so that the light incident from the correcting lens 3 is reflected straight.

의 확대 증배효과가 발생된다.In addition, since B = 600 C = 400, the screen is inside B so it is actually enlarged.

A multiplier effect is generated.

In addition, the reflectance of S = 50% is more than twice the brightness compared to the conventional screen of 25%.

Therefore, in the observation of the microscope image to which the present invention is applied, a small image of about 50 m / m is magnified on the screen of 400 m / m, so that the observation effect is excellent and the brightness is high. According to 3), the magnification effect, that is, the magnification effect of about 500 times, can be obtained.

Example 2

The example of FIG. 6 is an example mainly applied to a real microscope. As shown in (a) and (b), a prism 33 for introducing an image left, right, up and down is inserted into the objective lens 31 or the upper end of the projection lens, and the correction lens 3 is placed on the upper end thereof. Or the eyepiece 2 is placed and the light source lamp 32 is attached to the left and right ends of the objective lens 31, and the light source lamp 32 is attached to the microscope body 34, and the support frame 36 is formed at the bottom thereof to adjust the focus. Adjust (35) up and down. In this structure, the object irradiated by the light source lamps 32 at the left and right ends of the objective lens 31 is incident by the objective and the projection lens 31, and the upper and lower sides are inverted by the prism 33 so that the correction lens or the eyepiece ( Through 3), the reflection image is reflected on the screen by the reflector 4, and the observer is observed by the corrected magnification lens 6.

The resources of the optical composition at this time are as follows. (Unit: m / m)

Diameter of the screen: 200

Diameter of correction lens: 150

A = A ¹ + B ¹ = 400

B = 500

C = 400

R = 600

S = 70%

R ¹ = -500

R ² = +250

ND = 0.500

Since the logical assignment of such resources is the same as in Example 1 of the above embodiment, duplicate descriptions are omitted. However, when explaining the operation effect, as described in the description of the present invention, A = 300 R = 600, which corresponds to the formula of R = 2A, and F = 500 of the correcting lens 3, which corresponds to Equation 3.

Since the sensitivity of light is low during the real projection, the reflectance of the screen is improved by 75%, thereby reproducing more than three times the brightness of the conventional projection screen.

In addition, as B = 500 C = 400, it is possible to achieve about 80% screen magnification and magnification critical effects.

[Examples of Other Implementations]

7 is an example of an embodiment in which the structure of this screen is applied in various ways within the logic of the present invention described above.

In FIG. 7A, the screen 5 is positioned on the upper layer, the reflecting mirror 4 is placed at a downward 45 ° angle, and the magnification correction lens 6 is positioned at the front end thereof.

In (b), the reflective screen 5 and the magnification correction lens 6 are arranged on the coaxial line, and the reflecting mirror 4 is installed at the upper end and the incident reflector 4 is installed at the lower end. (c) also the magnification correcting lens 6 and the screen 5 are located on the same optical axis line, and a reflecting mirror 4 is placed at the bottom of the magnification correcting lens 6, and (d) the inverted reflector 4A is corrected. The reflector 4 is placed at the upper end of the lens 6 at a 45 ° angle in the forward direction, and the enlarged correction lens 6 is positioned at the top of the screen 5 at a diagonal of 90 °.

로 하고 R=2A로 구성하면서 C

B로 하고 R¹=-곡률 반경 또는 R²보다 낮은 +곡률반경 R²=+곡률반경, R¹+R²의 힘의 합인 f=B로 하고 반사 스크린(5)의 표면 반사율은 30%-90%로 한 것이다However, in all of the above embodiments, the basic logic of the present invention is the same. In other words

C and R = 2A

B = R ¹ =-radius of curvature or + radius of curvature lower than R ² R ² = + radius of curvature, f = B which is the sum of the forces of R ¹ + R ² , and the surface reflectance of the reflective screen 5 is 30%- 90%

Therefore, according to the present invention, the curvature of the screen 5 is tripled by the distance between the correction lens 3 and the reflective screen 5 as the incident distance, and the position of the correction lens 6 is focused by the curvature of the screen. By increasing the reflectance of the surface S of the screen from 30% to 90%, the brightness and clarity are more than doubled compared to the conventional transmissive screen, and the enlarged image is magnified by the correction magnification lens (6) to observe the image. And the spherical image due to the curvature of the screen is reflected by the magnification of the magnification correction lens (6) consisting of the front side is-curvature or planar or the rear side is bent at a curvature of + with a weaker curvature than the rear. ) Planarize the image of the surface to overcome the brightness deterioration due to the high magnification.

Claims (2)

In a microscope for projecting an image of a microscope onto a screen, the particle size of the screen surface 5 on which the image is formed is formed between 200 # -2500 #, and a reflective material such as aluminum is plotted on the surface. It consists of 90% reflecting surface and spherical shape, but the curvature radius (R) is more than twice the diameter of the screen itself. High-definition screen for microscopy projectors, characterized in that it is combined with a correction magnifying lens (6) with a magnification function having a positive force. The screen microscope of claim 1, wherein the structure of the high-visibility screen (5) for the projector of claim 1 is coupled to the eyepiece portion of a known general microscope.

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