CN1155947C - Static test device for storage characteristics of optical storage materials - Google Patents

Abstract

A static test device for storage characteristics of optical storage materials is mainly suitable for testing the storage characteristics of various optical disc recording layer materials. It includes a test light source part, a test display part, a light beam writing and reading part, a part for adjusting the measured position, a monitoring display part and a monitoring light source. The light beam writing and reading part is placed on the surface of the measured recording layer of the measured sample, and a high numerical aperture objective lens and a hemispherical solid immersion lens are combined into a microscope objective lens with a higher numerical aperture. Therefore, the present invention has higher resolution and measurement accuracy than the test device of the prior art. It is convenient to replace the high numerical aperture objective lens and the hemispherical solid immersion lens, and it is also convenient to adjust the position of the measured sample. The present invention has a monitoring display part and a monitoring light source. The focusing process can be monitored intuitively, and the morphology of the recording light spot and the recording point can be directly observed, so that the device test is intuitive and easy to operate, thereby improving the test efficiency.

Description

Static test device for storage characteristics of optical storage materials

Technical field:

The invention is a static test device for storage characteristics of optical storage materials. The main applicable optical storage materials refer to write-once disc (CD-R), read-write disc (CD-RW), high-density write-once disc (DVD-R) and high-density ) and other optical disc recording layer materials can also be used for other recordable and rewritable storage materials that are recorded point by point.

Background technique:

Perform static tests on the storage characteristics of optical storage materials, including determining the write wavelength, write power, write pulse width, erase wavelength, the relationship between erase power and erase pulse width, signal contrast and erasure rate. The first thing to do before storage materials are put into practical use. The test results reflect the comprehensive influence of material storage properties, preparation process and film-forming process. In the prior art, a static tester for the storage characteristics of optical storage materials was adopted using a magneto-optical disc static tester (see "Magneto-optical disc static tester", Chen Zhongyu, Gan Baihui, Liu Haiqing and Gan Fuxi, "Acta Optics Sinica", No. 11 Vol. 12, December 1991, pp. 1110-1114). The obvious defect of this tester is: only one wavelength of laser can be used for writing and erasing testing, and after changing the laser wavelength, the device cannot be used unless it is greatly modified or replaced; it is also very troublesome to replace the objective lens; The objective lens is under the sample to be tested, and it is impossible to add a hemispherical solid immersion lens; it is even more impossible to add an optical system for monitoring the focusing process and recording point morphology after writing and erasing.

Invention content:

The static test device for storage characteristics of optical storage materials of the present invention includes several parts, including a test light source part, a test display part, a light beam writing and reading part, a part for adjusting the measured position, a monitor display part and a monitor light source. Among them, the test light source part: contains a laser 6, along the optical axis oo along the forward direction of the light beam G emitted by the laser 6, an acousto-optic modulator 7, a beam expander assembly 8, a cubic polarizing prism 9, and a quarter-wave plate 10 are arranged in sequence. and beam splitter 11. The beam splitting surface of the beam splitter 11 is placed at an angle of 45° to the optical axis oo.

Among them, the test display part: contains the converging lens 12 and the photodetector 14 placed on the first vertical line o ₁ o ₁ passing through the center point of the beam splitting surface of the cubic polarizing prism 9 and perpendicular to the optical axis oo of the laser beam G emitted by the laser 6 . The output of the photodetector 14 is connected via an electronic control box 22 to a computer 23 with a display 24 .

The light beam is written into the readout part, including on the second vertical line o ₂ o ₂ passing through the central point Oo of the beam splitter 11 and perpendicular to the optical axis oo of the laser beam G emitted by the laser 6, the direction in which the light beam G ₁ is reflected by the beam splitter 11 An objective lens 13 with a numerical aperture > 0.8 and a hemispherical solid immersion lens 15 are placed on it, the spherical surface of the hemispherical immersion lens 15 faces the objective lens 13, and the focus of the objective lens 13 falls on the center point of the plane of the hemispherical solid immersion lens 15 .

The part of adjusting the measured position includes that the measured sample 16 is placed on the one-dimensional translation platform 19 with the first limit switch 18 and the second limit switch 20 inside, and the measured recording layer surface of the measured sample 16 In contact with the plane of the hemispherical wetting lens 15, in order to reduce the light loss at the plane contact between the surface of the measured recording layer and the hemispherical wetting lens 15, the surfaces of the two should be in close contact, and the maximum distance between the two surfaces should be less than 150 nanometers , or with an index of refraction oil between the two surfaces. The one-dimensional translation platform 19 is placed on the three-dimensional platform 21 , and the one-dimensional translation platform 19 is connected with a stepping motor 17 . The stepper motor 17 , the first limit switch 18 and the second limit switch 20 are connected with the computer 23 through the electronic control box 22 .

Said monitor display part includes on the second vertical line o ₂ o ₂ of the optical axis oo of the light beam G emitted by the above-mentioned laser 6, on the opposite direction of the forward direction of the light beam G ₁ reflected by the beam splitter 11, starting from the beam splitter 11 in sequence A semi-reflective beam splitter 4, a tube lens 3 and a video camera 1 with a monitor 2 are provided. The focus of the tube lens 3 falls precisely on the receiving surface 101 of the camera 1 . The light-splitting surface of the semi-reflective beam splitter 4 is placed at an angle of 45° to the second vertical line o ₂ o ₂ .

Said monitoring light source is a white light source 5, the optical axis _o3o3 of _the white light source 5 coincides with _the vertical line _o3o3 passing through _the center point of the semi-reflective beam splitter 4 and perpendicular to the second vertical line _o2o2 . It includes an illumination lens 501 , an aperture stop 502 , a field stop 503 and a focus lens 504 on the optical axis o ₃ o ₃ of the white light source 5 from the semi-reflective beam splitter 4 to the incandescent lamp 505 .

The beam-splitting surface of the beam-splitter mirror 11 is coated with a beam-splitting film with a reflectivity greater than 95% for the wavelength of the laser beam emitted by the laser 6 .

The surface of the measured recording layer of the tested sample 16 is in close contact with the plane of the hemispherical solid immersion lens 15, or a refractive index oil is placed between the two.

The optical storage material storage feature static testing device of the present invention has the structure as described above and shown in FIG. 1 . The structure of the present invention will be described in detail below in conjunction with the accompanying drawings. Said test light source part has laser 6. On one side of the emission window of the laser 6, there is an acousto-optic modulator 7, and the orientation of the acousto-optic modulator 7 should make the first-order diffracted light after the laser passes through it the strongest. A beam expander assembly 8 , a cubic polarizer 9 , a quarter-wave plate 10 and a beam splitter 11 are sequentially arranged in the forward direction of the light beam output from the acousto-optic modulator 7 . The optical axis oo of the beam expander 8 coincides with the first-order diffracted light of the AOM 7 . The centers of the cubic polarizing prism 9 and the quarter-wave plate 10 are located on the optical axis oo, and their incident planes are perpendicular to the optical axis oo. The direction of the fast axis of the quarter-wave plate 10 forms an angle of 45° with the polarization direction of the linearly polarized light output by the laser 6 . The beam splitting surface of the beam splitter 11 forms an angle of 45° with the optical axis oo, and its center point Oo is located on the optical axis oo.

The center point Oo of the splitting surface of the beam splitter 11 is perpendicular to the second vertical line o ₂ o ₂ of the optical axis oo. There is a hemispherical solid immersion lens 15, and the plane of the hemispherical solid immersion lens 15 is equivalent to placing the measured sample 16 , the tested sample 16 is placed on a one-dimensional translation platform 19 , and the one-dimensional translation platform 19 is placed on a three-dimensional platform 21 . A first limit switch 18 and a second limit switch 20 are installed in the one-dimensional translation platform 19 , and the first limit switch 18 and the second limit switch 20 are connected with an electronic control box 22 . The displacement of the one-dimensional translation stage 19 is driven by a stepper motor 17 connected thereto, and the stepper motor 17 is connected with an electronic control box 22 . The electronic control box 22 is connected with the computer 23 through a cable, and the signal generation interface board inside the computer 23 is connected with the acousto-optic modulator 7 through wires, and the input information and result information of the computer 23 are displayed by the display 24 connected with the cable. On the second vertical line o ₂ o ₂ between the hemispherical solid immersion lens 15 and the center point Oo of the beam splitting surface of the beam splitter 11, there is an objective lens 13 whose optical axis coincides with the second vertical line o ₂ o ₂ , The focal point of the objective lens 13 falls on the plane of the hemispherical solid immersion lens 15 . On the second vertical line o ₂ o ₂ , there is a camera 1 with a monitor 2 whose central axis coincides with the second vertical line o ₂ o ₂ . The solid immersion lens 15 is opposite. On the second vertical line o ₂ o ₂ between the beam splitter 11 and the receiving surface 101 of the camera 1, there is a lens tube lens 3 whose optical axis coincides with the second vertical line o ₂ o ₂ , and the lens tube lens 3 The focal point falls on the receiving surface 101 of the camera 1 . On the second vertical line o ₂ o ₂ between the beam splitter 11 and the barrel lens 3, there is a semi-reflective and semi-transparent beam splitter 4 whose center point of the reflective surface is on the second vertical line o ₂ o ₂ . The reflective surface of the semi-transparent beam splitter 4 faces the beam splitter 11 and forms an angle of 45° with the second vertical line o ₂ o ₂ .

There is _a vertical line o ₃ o 3 perpendicular to the second vertical line o 2 o ₂ passing through the center point of the reflective surface of the half-reflective beam splitter ₄ . This vertical line o ₃ o ₃ is the optical axis of the white light source 5 .

A photodetector 14 is placed on the first vertical line o ₁ o ₁ perpendicular to the optical axis oo by the central point of the beam splitting surface of the cubic polarizing prism 9, and its central axis is the same as the first vertical line passing through the central point of the cubic polarizing prism 9. The first vertical line o ₁ o ₁ coincides with the second vertical line o ₂ o ₂ . At the same time, the orientation of the laser 6 should make the polarization direction of the output linearly polarized light parallel to the plane determined by the first vertical line o ₁ o ₁ and the optical axis oo. The output of the photodetector 14 is connected to an electronic control box 22 . On the first vertical line o ₁ o ₁ between the photodetector 14 and the cubic polarizing prism 9, there is a converging lens 12 whose optical axis coincides with the first vertical line o ₁ o ₁ , and the focus of the converging lens 12 falls on on the receiving surface of the photodetector 14.

The beam expander assembly 8 includes a diverging concave lens 801 and a collimating convex lens 802 whose optical axes coincide with the optical axis oo, and the focal points of the two lenses coincide. The divergent concave lens 801 diverges the beam, and the collimating convex lens 802 turns the diverged beam into a parallel beam G. The diameter of the outgoing parallel beam G is larger than that of the incident beam, that is, it is larger than the first-order diffraction beam emitted by the acousto-optic modulator 7. The beam aperture is large.

Said beam splitter 11 is coated on the beam splitting surface to the emitting laser beam wavelength λ reflectivity of laser 6 and is greater than 95% beam splitting film, said that the beam splitting surface of said beam splitting mirror 11 is exactly the surface that is coated with beam splitting film.

Said semi-reflective and semi-transparent beam splitter 4 is coated with 50% to white light reflection on the surface, passes through the glass parallel plate of 50% semi-reflective and semi-transparent film layer, says the reflection of said semi-reflective and semi-transparent beam splitter 4 The surface is the surface coated with a semi-reflective and semi-transparent film layer for white light.

The numerical aperture of said objective lens is >0.8.

The radius of the hemisphere of said hemispherical solid wetted lens is less than 1 mm.

The said cubic polarizing prism 9 is formed by glueing two equilateral rectangular prisms, and the glued surface is coated with a polarizing beam splitting film, for the light whose polarization direction is perpendicular to the plane formed by the optical axis oo and the first vertical line o ₁ o ₁ (S) transmits, and reflects the light (P) whose polarization direction is parallel to the plane formed by the optical axis oo and the first vertical line o ₁ o ₁ . glued surface.

With the structure of the tester of the present invention as described above, the monochromatic (wavelength λ) linearly polarized parallel beam emitted by the laser 6 will be diffracted after passing through the acousto-optic modulator 7 . The first-order diffracted light of the acousto-optic modulator 7 forms a wide beam G after passing through the beam expander 8 . The light beam G passes through the polarizing beam splitting film of the cubic polarizing prism 9, transmits the S light, and reflects the P light. The linearly polarized light beam passing through the cubic polarizing prism 9 passes through the quarter-wave plate 10, because the fast axis direction of the quarter-wave plate 10 forms an angle of 45° with the polarization direction of the incident line polarized light, so passing through the quarter-wave plate 10 After a wave plate 10, the linearly polarized light beam becomes circularly polarized light. Pass through the beam splitter 11 again, because the beam splitting surface of the beam splitter 11 is a spectroscopic film coated with a reflectivity greater than 95% to the output laser wavelength λ of the laser device 6 on the surface, so the light beam has 95% of the light beam to be reflected through the beam splitter 11 After that, it becomes a parallel beam G ₁ , which passes through the objective lens ₁₃ and converges the beam on the surface of the tested sample 16, because the plane of the hemispherical solid immersion lens 15 is placed on the surface of the tested sample 16, that is, hemispherical The plane of the solid immersion lens 15 is in close contact with the surface of the tested sample 16 . Moreover, the side of the tested sample 16 in contact with the hemispherical solid immersion lens 15 is the tested surface coated with a recording layer. The converging light beam passing through the objective lens 13 finally converges to the focal point of the objective lens 13 after passing through the spherical surface of the hemispherical solid wetting lens 15, which is also the center point of the plane of the hemispherical solid wetting lens 15, that is, the light beam passes through the plane of the hemispherical solid wetting lens 15 Then converge on the surface of the test sample 16 with the recording layer. The tested sample 16 is placed on a one-dimensional translation stage 19 . The one-dimensional translation stage 19 is fixed on the three-dimensional platform 21 again. The three-dimensional platform 21 and the one-dimensional translation stage 19 are used to adjust the translation and the position of the sample 16 to be measured 16 up, down, left, right, front, back, and back. The one-dimensional translation stage 19 is driven and displaced by a stepper motor 17 connected thereto. The stepper motor 17 is connected with the electronic control box 22 . The electronic control box 22 controls the stepper motor 17 to work. The first limit switch 18 and the second limit switch 20 are installed in the one-dimensional translation platform 19 and connected with the electronic control box 22 . When the one-dimensional translation platform 19 moves to a certain position, one of the first limit switch 18 and the second limit switch 20 will send a signal to the electronic control box 22 . Because the electronic control box 22 is connected with the computer 23, the computer 23 controls the movement of the one-dimensional translation platform 19 through the electronic control box 22, the stepping motor 17, the first limit switch 18 and the second limit switch 20. The signal generation interface board inside the computer 23 is connected to the acousto-optic modulator 7 to control the intensity and on-off time of the first-order diffracted light of the acousto-optic modulator 7 . Input information and result information of the computer 23 are displayed by a display 24 connected thereto through a cable.

The light beam converging at the focal point of the objective lens 13 is reflected by the recording layer on the test sample 16 placed at the focal point of the objective lens 13, returns along the original path, and passes through the transmission of the hemispherical solid immersion lens 15, the refraction of the objective lens 13, and the beam splitter. After the reflection of 11, it is incident on the quarter-wave plate 10. After passing through the quarter-wave plate 10, the circularly polarized light becomes linearly polarized light, and the polarization direction is proportional to the polarization direction of the linearly polarized light output by the laser 6. 90 ° angle, when it is incident on the cubic polarizing prism 9 again, the light beam will be converged through the converging lens 12 after being reflected by the dichroic surface in the cubic polarizing prism 9, and the converging point is on the receiving surface of the photodetector 14, and the photodetector 14 will light The signal is converted into an electrical signal and sent to the electronic control box 22, and the electronic control box 22 sends the electrical signal to the computer 23, and the computer 23 performs A/D conversion and data acquisition on the electrical signal. The result is displayed on the display 24 .

The white light beam G2 emitted by the white light source ₅ is reflected by the semi-reflective and semi-transparent beam splitter 4, passes through the beam splitter 11, the objective lens 13 and the hemispherical solid immersion lens 15 and converges to the surface of the test sample 16 with a recording layer. The white light beam reflected by the surface of the measured sample 16 with a recording layer passes through the hemispherical solid infiltration lens 15, is collected by the objective lens 13, passes through the beam splitter 11 and the semi-reflective beam splitter 4, and the transmitted light forms a beam G3, which passes through the After the lens tube lens 3 , an image of the surface of the test sample 16 with the recording layer is formed on the image side focal plane of the lens tube lens 3 . Just the receiving surface 101 of the camera 1 is on the focal plane of the image side of the lens barrel lens 3, so the camera 1 will send the received image of the surface of the tested sample 16 having a recording layer to the monitor 2 for display, thus continuously The state of the sample 16 to be tested is closely monitored. As shown in Figure 1.

In the tester of the present invention, at first the beam writing and reading part is placed on the surface of the measured recording layer of the measured sample 16, which is convenient to adjust, wherein the objective lens 13 with a numerical aperture>0.8 is combined with a hemispherical solid immersion lens 15 to form a Higher numerical aperture microscope objectives. For this reason, the test device of the present invention has higher resolution and higher measurement precision than the measuring device of the prior art. Moreover, it is convenient to replace the objective lens 13 and the hemispherical solid immersion lens 15. The light source part of the test device of the present invention is to separate the parts related to the wavelength of the laser 6 from the parts irrelevant to the wavelength of the laser 6. After replacing the laser 6, only need to fine-tune the beam expander assembly 8, and replace the cubic polarizing prism 9, a quarter A wave plate 10 and beam splitter 11, other parts or elements do not need to be fully adjusted and replaced, which expands the range of use of the device; because the objective lens 13 can be replaced like a microscope objective lens; certainly the hemispherical solid immersion lens 15 can be added or not Add it, after adding it, you can conduct near-field optical storage research, and measure high-density optical disc reading and writing. If you don’t add it, it is an ordinary static test device. The present invention contains a monitoring display part and a monitoring light source part, which can visually monitor the focusing process, and directly observe the morphology of the recording spot and the recording point (the point written for the first time or the point after erasing), so that the tester of the present invention The test is intuitive and easy to operate, which improves the efficiency of the test.

Description of drawings:

Fig. 1 is a schematic structural view of a static test device for storage characteristics of an optical storage material according to the present invention.

Detailed ways:

The device is shown in Figure 1. The laser 6 is an argon ion gas laser (wavelength 514.5nm), with a beam diameter of about 1mm, a divergence of 1 milliradian, and a maximum power greater than 100mW. The carrier frequency of the acousto-optic modulator 7 is 100MHz, the modulation frequency is 0-10MHz, and the diffraction efficiency is greater than 85%. The numerical aperture of the objective lens 13 is 0.9, and the working distance is 2mm. The beam expansion magnification of the beam expander assembly 8 is 10 times. The hemispherical solid immersion lens 15 has a refractive index greater than 1.8 and a radius of 0.714 mm. Tube lens 3 focal length 200mm. Video camera 1 is a 1/4 " color charge-coupled device (CCD) camera. Monitor 2 is a fourteen-inch color monitor. In the test process, as the structure of above-mentioned Fig. 1, tested sample 16 is placed on one-dimensional translation stage 19 First, adjust the one-dimensional translation stage 19 and the three-dimensional platform 21 so that the measured surface of the measured sample 16 is in close contact with the plane of the hemispherical solid immersion lens 15, or add a layer of refractive index oil between the two to improve the near-field coupling efficiency. Turn on all power supplies, including the power supply of the laser 6, the power supply of the acousto-optic modulator 7, the power supply of the electronic control box 22, the power supply of the computer 23, the power supply of the display 24, the power supply of the incandescent lamp 505, the power supply of the video camera 1 and the monitoring The power supply of the device 2. The laser device 6 has a laser output. A DC signal is sent to the AOM 7 by the computer 23, and the laser device 6 passes through the AOM 7 to produce a constant first-order diffracted light to adjust the orientation of the AOM 7 , make the first-order diffracted light the strongest. Controlled by computer 23, a zero signal is output to the acousto-optic modulator 7, so that the first-order diffracted light disappears, and the output laser light of laser device 6 just cannot be incident on beam expander assembly 8 and subsequent on the optical element.

At the same time, the white light beam _G2 emitted by the white light source 5 is incident on the semi-reflective and semi-transparent beam splitter 4, and is incident on the beam splitter 11 after being reflected by it; incident on the hemispherical solid immersion lens 15. At this time, the objective lens 13 and the hemispherical solid immersion lens 15 are combined with a microscope objective lens with a higher numerical aperture, which converges the light beams incident on them to the surface of the measured sample 16 having a recording layer. The light scattered by the surface of the recording layer measured by the measured sample 16 is collected by the hemispherical solid immersion lens 15 and the objective lens 13, returns along the original path, and passes through the beam splitter 11 and the half-reflection beam splitter 4. The barrel lens 3 images the surface of the sample 16 with the recording layer on the receiving surface 101 of the camera 1 . The monitor 2 displays the surface image of the test sample 16 with the recording layer. At the beginning, the position of the hemispherical solid infiltration lens 15 may be inappropriate, and there is no image displayed on the monitor 2. At this time, the three-dimensional platform 21 is adjusted left and right, front and rear, and up and down, so that the image is displayed on the monitor 2.

Then controlled by the computer 23, the stepping motor 17 is rotated one step in a certain direction, and the one-dimensional translation table 19 is displaced one step in a certain direction thereupon, and the computer 23 sends an electric pulse signal to the acousto-optic modulator 7, and the acousto-optic modulation The first-order diffracted light behind the device 7 becomes a light pulse, which becomes a light beam G after being expanded by the beam expander assembly 8, and is incident on the cubic polarizing prism 9, and the light beam passing through the cubic polarizing prism 9 passes through a quarter wave After the plate 10, it becomes circularly polarized light. The circularly polarized light is reflected on the beam splitter 11 and becomes a parallel light beam G ₁ . Parallel light beam G ₁ converges on the focal point of the objective lens 13 on the recording layer of the tested sample 16 after passing through the objective lens 13 and the hemispherical solid immersion lens 15, and at the same time records a point (for writing test), on the monitor 2 to observe the shape of the point.

The computer 23 sends an electrical pulse signal with a smaller amplitude to the AOM 7, and the first-order diffracted light after passing through the AOM 7 becomes a light pulse with a smaller power, and the light beam is also converged at the end of the objective lens 13 through the above-mentioned process. At the focal point, that is, the same point on the recording layer of the tested sample 16, due to the low power of the light pulse, it cannot record a point and can only be used to read the reflectivity change of this recording point, and the light scattered by the recording point travels along the original path. Return, after being reflected by the hemispherical solid immersion lens 15, the objective lens 13 and the beam splitter 11, it is incident on the quarter-wave plate 10, and after passing through the quarter-wave plate 10, the circularly polarized light becomes linearly polarized light, And the polarization direction is at an angle of 90° to the polarization direction of the linearly polarized light output by the laser 6, so when it is incident on the cubic polarizing prism 9, the cubic polarizing prism 9 will reflect the light beam. After being reflected on the converging lens 12, it converges on the receiving surface of the photodetector 14. The photodetector 14 converts the optical signal into an electrical signal, and sends it to the electronic control box 22 for reading by the computer 23. The above is a writing process and a reading process. When testing the signal contrast of the material, it is a process of reading first, recording the output signal of the photodetector 14 at this time, writing it once, and reading it again, recording the output signal of the photodetector 14 at this time, two The difference in signal represents the signal contrast. The test process of erasing rate is like this: carry out the process of reading first, record the photodetector 14 output signals of this moment, write once, erase once (by the electric pulse signal that computer 23 outputs to AOM 7 The amplitude is between the writing and reading amplitude, and the others are the same as the writing and reading process), and then read again, and record the output signal of the photodetector 14 at this time, and the difference between the two signals represents the erasing Rate. The length and amplitude of the electrical pulse signals for writing, reading and erasing are variable, and the one-dimensional translation stage 19 moves one step in a certain direction to change the length or amplitude of the electrical pulse signals for writing, reading or erasing , repeat once, and then take a step further, and then change the length or amplitude of the electrical pulse signal for writing, reading or erasing, and repeat it again, so that it can be repeated several times or dozens of times to give a signal contrast or erasure A curve in which the rate varies with a certain condition.

Measure the static characteristics of the optical storage material according to the above steps, the highest write power is 25mW, the lowest read power is 0.2mW, and there are 256 levels from the highest power to the lowest power. The pulse width is from 50 nanoseconds to 5 microseconds, divided into 256 steps. The total noise-to-signal ratio is below 1%. The computer 23 realizes the automation of the test.

Claims (3)

1. A static test device for storage characteristics of optical storage materials, comprising <1> Test light source part: including an acousto-optic modulator (7), a beam expander (8), and a cubic polarizing prism ( 9), a quarter wave plate (10) and a beam splitter (11), the beam splitting surface of the beam splitter (11) is placed at an angle of 45° with the optical axis (oo); <2> Test display part: Contains the first vertical line (o ₁ o ₁ ) placed at the center point of the beam splitting surface of the cubic polarizing prism (9) and perpendicular to the optical axis (oo) of the beam (G) emitted by the laser (6) ) on the convergent lens (12) and photodetector (14), the output of photodetector (14) is connected to the computer (23) with display (24) by electronic control box (22); Its characteristics are: <3> Beam writing and reading part: include the second vertical line ( _o2 ) perpendicular to the optical axis (oo) of the laser (6) emitting beam (G) passing through the center point (Oo) of the beam splitter (11) o ₂ ), the beam splitter (11) reflects the light beam (G ₁ ) in the forward direction and is equipped with an objective lens (13) with a numerical aperture > 0.8 and a hemispherical solid immersion lens (15), the hemispherical solid immersion lens (15) The spherical surface faces the objective lens (13), and the focal point of the objective lens (13) falls on the center point of the plane of the hemispherical solid immersion lens (15); <4> Adjusting the measured position part: including the measured sample (16) placed on the one-dimensional translation platform (19) with the first limit switch (18) and the second limit switch (20) inside, the measured The surface of the measured recording layer of the sample (16) is in contact with the plane of the hemispherical infiltration lens (15), the one-dimensional translation stage (19) is placed on the three-dimensional platform (21), and the one-dimensional translation stage (19) is connected with a stepping motor (17), stepper motor (17), the first limit switch (18) and the second limit switch (20) link to each other with computer (23) by electronic control box (22); <5> There is a monitoring and display part: including on the second vertical line (o ₂ o ₂ ) of the optical axis (oo) of the beam (G) emitted by the above-mentioned laser (6), reflected beam (G ₁ ) by the beam splitter (11) ) on the opposite direction of the forward direction, starting from the beam splitter (11), a semi-reflective and semi-transparent beam splitter (4), a lens tube lens (3) and a video camera (1) with a monitor (2) are arranged successively, and the lens tube lens The focus of (3) just falls on the receiving surface (101) of the camera (1), and the light-splitting surface of the semi-reflective and semi-transparent beam splitter (4) is placed at an angle of 45° with the second vertical line (o ₂ o ₂ ); <6>The monitoring light source is a white light source (5), the optical axis (o ₃ o ₃ ) of the white light source (5) is perpendicular to the second vertical line (o ₂ o ₂ ) coincides with the vertical line (o3o ₃ ), which includes lighting on the optical axis (o ₃ o ₃ ) of the white light source (5) between the semi-reflective and semi-transparent beam splitter (4) and the incandescent lamp (505). Lens (501), aperture stop (502), field stop (503) and focusing lens (504). 2. The optical storage material storage characteristic static testing device according to claim 1, characterized in that the beam splitting surface of said beam splitter (11) is coated with a laser beam (6) emitting laser beam wavelength reflectivity greater than 95%. Spectral film. 3. optical storage material storage characteristic static test device according to claim 1, it is characterized in that the measured recording layer surface of said measured sample (16) and the plane of hemispherical solid wetting lens (15) are close contact , or put refractive index oil in between.

Images