A horizontal reflective seat

Abstract

The present invention provides a horizontally placed reflective seat, which can be generally used in optical detection devices where the excitation light beam and the emission light beam form an arbitrary angle θ, so as to realize optical detection by placing the sample horizontally. The reflective seat is an irregularly shaped one-piece block, whose oblique side makes an angle β with the horizontal mounting surface, and the surface of the oblique side is evaporated with reflective material. The installation is simple, and the reflective seat is installed so that the distance ab1=ab2 from the intersection point a of the excitation light beam and the emission light beam to their intersection points b1 and b2 with the oblique side of the reflective seat are equal, and the sample is placed at position d. The reflective seat and the sample installation placement position meet the requirements. The reflective seat can also couple optical fiber and external light source to realize the detection of wide-band luminescence characteristics of the sample.

Description

Technical Field

[0001] The invention discloses a universal reflective seat for realizing horizontal placement of samples for optical detection, belongs to the technical field of optical detection, and specifically relates to a horizontal placement reflective seat. Background Art

[0002] When performing conventional spectral detection of samples such as absorption, fluorescence, ultraviolet, infrared, Raman, etc., there are usually two detection light paths: one is that the excitation light beam penetrates the sample, and the emission, scattering and transmission emission after the sample is excited are detected on the other side; the other is that the excitation light beam excites the sample, and the emission light is detected at a certain angle to the incident direction on the front surface of the sample. When the selected angle avoids the reflected and transmitted light beams, the emission or scattering spectrum can be tested more accurately. In addition, for some samples such as optical films or anisotropic crystals, it is necessary to test the changes in optical properties such as excitation, emission, and reflection at different angles, so it is necessary to detect them at different angles. For most optical detection devices where the excitation and detection directions are at a certain angle (usually 90°), the samples are generally placed vertically for detection. Liquid samples can be placed in a cuvette, while powder samples need to be ground and pressed into sheets, clamped with windows and fixed on the sample holder by a fixture for detection. Sample preparation is cumbersome and the test time is prolonged; and for some materials with extremely high hardness, it is difficult or even impossible to grind them into fine powder and press them into sheets for detection, and their optical property detection is more troublesome. In order to solve the above problems, the present invention provides an optical detection device that can be used when the excitation light beam and the emission light beam are at any angle, which realizes a reflective seat for horizontal placement of the sample for optical detection, saves sample testing time, and realizes convenient and fast detection of the optical properties of the sample, which is of great significance for promoting the advancement of optical detection technology. Summary of the invention

[0003] In view of the above problems existing in the prior art, the present invention provides a horizontally placed reflective seat, which can be generally used in optical detection devices in which the excitation light beam and the emission light beam are at any angle, so as to realize optical detection by horizontally placing the sample.

[0004] The present invention provides a horizontally placed reflective seat, such as Figure 1 As shown, the top is a rectangular plane with a circular through hole in the center for coupling optical fiber and external light source; the bottom is a right-angled triangular plane; the reflective seat has the long side of the bottom right-angled triangular plane as an edge, and has an inclined side surface at an angle β to the bottom right-angled triangular plane, and the surface of the inclined side surface is evaporated with reflective material, which is used to reflect the excitation light beam to irradiate the sample surface, and then reflect the emission light beam to the spectral detector for collection and processing.

[0005] Specifically, Figure 3As shown, the known position of the intersection of the excitation beam and the emission beam is recorded as a, the known intersection angle of the excitation beam and the emission beam is recorded as θ (0°<θ<180°), the known vertical distances between the excitation beam and the emission beam and the horizontal mounting surface are recorded as r, the position of the intersection of the excitation beam and the oblique side surface is recorded as b1, the position of the intersection of the emission beam and the oblique side surface is recorded as b2, the position of the sample placed on the horizontal mounting surface is recorded as d, the distances between points a, b1, b2 and d are recorded as ab1, ab2, db1, db2 respectively, and the horizontal placement reflector and the sample placement position meet

[0006] Beneficial effects of the present invention:

[0007] (1) The present invention discloses a horizontally-mounted reflective seat, which is an irregularly-shaped integrated block, is easy to install, and can be generally used in optical detection devices where the excitation light beam and the emission light beam form any angle θ (0°<θ<180°).

[0008] (2) The present invention discloses a horizontal reflective seat, wherein the angle between the oblique side surface of the horizontal reflective seat and the horizontal plane is β. According to known conditions such as the intersection angle θ between the excitation light beam and the emission light beam, and the vertical distance r between the excitation light beam and the emission light beam and the horizontal mounting surface, the reflective seat is mounted on At the position, the excitation light beam is reflected by the oblique side and then irradiates the sample, and the fluorescence emitted by the sample is reflected by the oblique side and then enters the spectrum detector, so that the sample can be placed horizontally for detection.

[0009] (3) The present invention discloses a horizontal reflective stand, in which the powder solid sample does not need to be pressed into a window piece and can be directly placed horizontally for testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is the appearance of a horizontal reflector seat.

[0011] Figure 2 A schematic diagram of a horizontally lofted reflector seat cut along the top diagonal line

[0012] Figure 3 A three-dimensional schematic diagram of the optical path of a horizontal reflector

[0013] Figure 4 A side view of the optical path of a horizontal reflector

[0014] Figure 5 A first embodiment of a horizontally placed reflective seat

[0015] Figure 6 A second embodiment of a horizontally placed reflective seat

[0016] Figure 7A third embodiment of a horizontally placed reflective seat

[0017] In the figure: 1-reflector, 2-excitation light source, 3-spectral detector, 4-sample, 5-external light source, 6-optical fiber DETAILED DESCRIPTION

[0018] The technical scheme of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation cases. It should be understood that the following embodiments are only exemplary descriptions and explanations of the present invention and should not be construed as limiting the scope of protection of the present invention. All technologies implemented based on the above content of the present invention are included in the scope that the present invention is intended to protect.

[0019] The present invention provides a horizontally placed reflective seat, such as Figure 1 As shown, the top is a rectangular plane with a circular through hole in the center for coupling the optical fiber 6 and the external light source 5; the bottom is a right-angled triangular plane; the reflective seat 1 has an inclined side surface formed at an angle β with the long side of the bottom right-angled triangular plane as an edge, and the surface of the inclined side surface is evaporated with reflective material, which is used to reflect the excitation light beam to irradiate the surface of the sample 4, and then reflect the emission light beam to the spectral detector 3 for collection and processing.

[0020] Specifically, Figure 3 As shown, the position of the intersection of the excitation beam and the emission beam is recorded as a, the position of the intersection of the excitation beam and the oblique side surface is recorded as b1, the position of the intersection of the emission beam and the oblique side surface is recorded as b2, the midpoint of the bottom edge of the oblique side surface of the reflector 1 is recorded as c, the position of the sample placed on the horizontal mounting surface is recorded as d, the distances between points a, b1, b2, c, and d are recorded as ab1, ab2, ac, db1, db2, dc, and b1b2, respectively, and the sample is placed at position d on the horizontal mounting surface, so that ab1=ab2=db1=db2=D (D>0).

[0021] It is known that the intersection angle of the excitation beam and the emission beam is denoted as θ (0°<θ<180°), and the midpoint of b1b2 is denoted as e, then points a, c, d and e are on the same plane, and the distances between points a, c, d and e are denoted as ae, ce, de, ae∥cd; since ab1=ab2=db1=db2=D, according to the relationship between the sides and angles of the triangle, ae=de=Dsin(90°-θ / 2), ∠dce=∠aec=β, it can be seen that points a, c, d, and e together form an equilateral parallelogram, that is, ae=de=ac=dc=Dsin(90°-θ / 2), ∠dce=∠ace=∠aec=∠ced=β.

[0022] It is known that the vertical distance between the excitation beam and the emission beam and the horizontal mounting surface is recorded as r, that is, the length of the perpendicular line of the side dc of the isosceles triangle (de=dc) formed by points c, e, and d is r. According to the relationship between the side and angle of the triangle, de=r / sin(180°-2β).

[0023] In summary, since de = Dsin[90°-(θ / 2)] = r / sin(180°-2β), the reflector 1 is installed at Location.

[0024] When the luminescence characteristics of the sample 4 are detected, according to the angle θ between the excitation light beam emitted by the excitation light source 2 and the emission light beam received by the spectrum detector 3, the oblique side of the reflector 1 forms an angle β with the horizontal direction, and the reflector 1 is installed in the sample compartment of the spectrum detection instrument, so that the excitation light beam and the emission light beam are respectively hit at the positions b1 and b2 on the oblique side of the reflector 1, which are respectively at a distance from the intersection point a of the excitation light beam and the emission light beam. Then place the sample 4 on the mid-perpendicular line of the bottom edge of the oblique side of the reflective seat 1, at a distance of 1.5 meters from the bottom edge of the oblique side Location.

[0025] Example 1

[0026] like Figure 5 The first embodiment of the horizontally placed reflective seat 1 is shown. The reflective seat 1 is installed and the sample 4 is placed according to the above method, and the luminescence characteristics of the sample 4 are detected. The excitation light source 2 is turned on to emit an excitation light beam (solid arrow), which hits the oblique side b1 of the reflective seat 1 and is reflected to the sample 4. The fluorescent light beam (dashed arrow) emitted by the sample 4 after being excited is reflected by the reflective seat 1 and enters the spectrum detector 3 for data processing and output.

[0027] Example 2

[0028] like Figure 6 The second embodiment of the horizontally placed reflective seat 1 is shown. The reflective seat 1 is installed according to the above method and the sample 4 is placed. The external light source 5 is connected to one end of the optical fiber 6. The other end of the optical fiber 6 is installed in the central circular through hole opened on the top of the reflective seat 1. The external light source 5 is used to detect the luminescence characteristics of the sample 4. The external light source 5 is turned on, and the emitted excitation light beam (dotted arrow) is vertically downwardly irradiated through the optical fiber 6 to the surface of the sample 4. The fluorescence emitted by the sample 4 after being excited is reflected by the reflective seat 1 and enters the spectrum detector 3 for data processing and output.

[0029] Example 3

[0030] Figure 7The second embodiment of the horizontally placed reflective seat 1 is shown. According to the above method, the reflective seat 1 is installed and the sample 4 is placed. The external light source 5 is connected to one end of the optical fiber 6. The other end of the optical fiber 6 is installed in the central circular through hole opened on the top of the reflective seat 1. The sample 4 is excited by the excitation light source 2 and the external light source 5 at the same time, and the wide-band luminescence characteristics of the sample 4 are detected. The excitation light source 2 and the external light source 5 are turned on at the same time. The excitation light beam (solid arrow) emitted by the excitation light source 2 is hit at the oblique side b1 of the reflective seat 1 at an angle β and is reflected to the sample 4. The excitation light beam (dotted arrow) emitted by the external light source 5 is vertically downwardly irradiated to the surface of the sample 4 through the optical fiber 6. After the sample 4 is excited by the excitation light beams of different wavelengths emitted by the excitation light source 2 and the external light source 5, the emitted fluorescent light beam (dotted arrow) is reflected by the oblique side of the reflective seat 1 again and enters the spectrum detector 3 for data processing and output.

[0031] The above is an explanation of the embodiments of the present invention. However, the present invention is not limited to the above embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A horizontally placed reflective seat, characterized in that: The top of the horizontal lofting reflective seat is a rectangular plane with a circular through hole in the center; the bottom is a right-angled triangular plane; the horizontal lofting reflective seat has an inclined side surface formed at an angle β with the long side of the right-angled triangular plane at the bottom as an edge, and the surface of the inclined side surface is evaporated with a reflective material for reflecting the excitation light beam to illuminate the sample surface, and then reflecting the emission light beam to the spectrum detector for collection and processing; The external light source is connected to one end of the optical fiber, and the other end of the optical fiber is installed in the central circular through hole opened on the top of the horizontal lofting reflective seat; Wherein, the horizontal reflective seat and the sample placement position satisfy ab1=ab2=db1=db2=D= , the definitions of each parameter are as follows: The position of the intersection of the known excitation beam and the emission beam is recorded as a, the angle of intersection between the known excitation beam and the emission beam is recorded as θ, where 0°<θ<180°, the vertical distance between the known excitation beam and the emission beam and the horizontal mounting surface is recorded as r, the position of the intersection of the excitation beam and the oblique side surface is recorded as b1, the position of the intersection of the emission beam and the oblique side surface is recorded as b2, the position of the sample placed on the horizontal mounting surface is recorded as d, and the distances between points a, b1, b2 and d are recorded as ab1, ab2, db1, db2, respectively.

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