Device for determining angular distribution of radiation reflected from object surface being examined

FIELD: engineering of devices for determining angular distribution of radiation reflected from object surface.

SUBSTANCE: claimed device contains radiation emitter, radiation receiver, transformer of radiation to photocurrent and information processing block, base in form of a ring and two semi-rings. On each semi-ring, emitter and receiver of radiation are mounted. Semi-rings are mounted perpendicularly to measurement plane. One of semi-rings is moveable relatively to the base. Also, aforementioned semi-rings may be made shortened.

EFFECT: it is possible to determine angular distribution of radiation which is reflected from object surface being examined, at any angles of falling radiation by changing positions of radiation receiver within limits of spatial angles of distribution of reflected radiation for different positions of radiation source.

2 cl, 3 dwg

 

The invention relates to the field of measuring optical characteristics of surfaces, namely, devices for determining the angular distribution of the radiation reflected from the surface of the object.

The known device, brochure 2005, belonging to the family of consoles, SMART ACCESSORIES™ FTIR the spectrometer Nicolet™manufactured one of the leading in this area of the US firms thermo Nicolet, for determining the diffuse reflection of radiation from small samples of hard and soft powders, polymers, organic and inorganic chemicals, paints and catalysts (Smart Collector, Diffuse Reflectance, NearIR UPDRIFT). The optical elements of the device is directed to the radiation detector of the spectrometer diffuse components of the radiation reflected from the sample. However, they exclude the specular component of the reflected radiation. The result is determined by the total solid angle of the radiation diffusely reflected by the sample.

Also known device (brochure 2005) SpecuIATR, Refractor, SAGA of the same family of consoles from the same company. They are designed to determine the specular component of the light reflected from samples of thin films on metal surfaces, lubricants and monomolecular layers. The optical elements of the device is directed to the radiation detector of the spectrometer mirror the outgoing radiation, reflected from the sample, and exclude diffuse components. The result is determined by the radiation specularly reflected by the sample.

The disadvantage of these consoles, Smart Accessories™produced by the company, is the impossibility of determining the angular distribution of the reflected surface radiation, since the radiation is determined using consoles as the total solid angle diffuse or specular component. Another disadvantage of the family of consoles, Smart Accessories™ is the inability to determine the optical characteristics of the surfaces of objects, bypassing complex and value stage of manufacturing samples of the elements of the object, with the persistence of the samples changes the optical properties of surfaces, which may occur during their operation, for example, by deposition on the surface of carbon black or oxidation. In addition, optical properties of surfaces depend on the materials from which they are made, how they are processed and may have different abilities to reflect at different angles abusee radiation, that is, their reflectivity can vary from purely diffuse or specular surface. For such surfaces also need to measure the optical characteristics of the surfaces throughout the range of angles of reflection when passing the x angles to the incident radiation.

The closest technical solution adopted for the prototype, is a "non-contact method of determining the quality of the surface and the device for its implementation", patent of Russian Federation №2249787 April 10, 2005, where the surface quality is determined by obtaining specular and diffuse component reflected from the surface of the light radiation, the formation of the reference pulses, converting the pulses from the diffuse and specular components in the photocurrent and identify the quality of the surface.

The drawback of the device determine the quality of the surface is that with this device it is impossible to determine the distribution of the reflected radiation on spatial angles at given angles to the incident radiation.

The objective of the proposed technical solution is the determination of the angular distribution of radiation reflected from the test object surface at all angles of incident radiation by changing the positions of the radiation detector within the spatial angle distribution of the reflected radiation for different positions of the radiation source. When the measurement is performed directly from the object surface, and not from a sample made from the surface of an object that accelerates the measurement increases the accuracy and reduces the cost of measurement.

Technical result is achieved in the proposed device for determining the angular distribution of the radiation, reflected from the examined surface of the object containing the radiation source, the radiation detector, the radiation Converter in photo libraries and the processing unit, and, according to the invention, the device comprises a base, made in the form of a ring, on which there is fixed a semi-circle, the ends of which are fixedly mounted on the base, and movable semi-circle, the ends of which are mounted on movable elements, actuators, and are able to move along the ground, both half rings have the same diameter as the diameter of the base of the ring perpendicular to the plane of the ring and are located on the side opposite the sample surface of the object, when on both half rings also have movable elements with electric actuators, with one of the movable elements mounted radiation source, and the other with the radiation receiver and the radiation source and the radiation detector is directed towards the sample surface of the object and the optical axis of the radiation source and the radiation detector intersect at the point of intersection of the axis of symmetry of the base with an investigated surface of the object.

Device for determining the angular distribution of the radiation reflected from the test object surface (option)containing a radiation source,a radiation receiver, the transducer radiation in the photocurrent and the processing unit, and, according to the invention, the device comprises a base, made in the form of a ring, on which there is fixed a semi-circle, the ends of which are fixedly mounted on the base, and movable semi-circle, the ends of which are mounted on movable elements, actuators, and are able to move along the ground, and the two half rings are made shorter, and the distance between the ends of each shorter half rings of equal diameter at the base, shorter half perpendicular to the plane of the ring and are located opposite the investigated object surface, with both shorter half rings mounted movable elements with electric drives and on the basis, by the monitored object's surface, there are support regulation of the distance between the base and the investigated surface of the object, while on one of the movable elements mounted radiation source, and the other with the radiation receiver and the radiation source and the radiation detector is directed towards the sample surface of the object and the optical axis of the radiation source and the radiation detector intersect at the point of intersection of the axis of symmetry of the base with an investigated surface of the object.

Thus, especially able to determine the three-dimensional angular distribution of radiation in the hemisphere, reflected from the investigated planar surface or from the studied non-planar surface, for example, from the inner surface of the cylinder. In both cases, moving the radiation source and the radiation detector occur at stationary and moving as semirings and shortened the half rings, and the optical axis of the radiation source and the radiation detector intersect at the point of intersection of the axis of symmetry of the base with the test surface. The distance from the radiation source and the radiation detector to the point where the measurement is taken when the movement of the radiation source and the radiation receiver and the change of their spatial angles remain constant. While measuring the reflected radiation to perform directly on the surface of the object, not on the samples, as suggested in balagah in the prototype, which eliminates the need of damage to the object, and sometimes costly in manufacture of the sample, thereby improving the measurement accuracy, speeds up the measurement process and decreases their value.

Figure 1 shows a diagram of a device for determining the angular distribution of the radiation reflected from the investigated planar surface of the object.

Figure 2 shows a diagram of the rolling element with the actuator (Type a).

Figure 3 shows the diagram of a device for determining Uglova the distribution of radiation, reflected from the test object surface (option), mainly reflected from the examined non-planar surface of the object.

Device for determining the angular distribution of the radiation reflected from the investigated planar surface of the object in figure 1 comprises a base 1 made in the form of a ring, the radiation receiver 2, the optical axis 12 of the radiation receiver 2, a movable semi-circle 3, the axis of symmetry 4 of the base 1, the stationary half ring 5, the radiation source 6, the optical axis 7 of the radiation source 6, the movable element 8, the actuator 9, the analyzed surface of the object 11, the point of intersection 10 of the axis of symmetry of the base 4 to the inspected surface of the object 11, the direction of movement 17 of the rolling of the ring 3 on the base 1, the direction of movement 18 of the rolling element 8 on a stationary half ring 5, the direction of movement 19 of the rolling element 8 with the radiation receiver 2 of the rolling semi-circle 3, the radiation Converter in photo libraries 15, the processing unit 13. Half rings 3 and 5 have the same diameter as the diameter of the base 1.

The movable element 8 with the actuator shown in figure 2 (type a), contains a stationary half ring 5, the movable element 8, the actuator 9, screw connection 16.

Device for determining the angular distribution of the radiation reflected from the research neprosledovannoe object (variant) claim 2, figure 3, comprises a base 1 made in the form of a ring and has a diameter equal to the diameter of the shorter half-rings 3 and 5, mounted on the base 1. This shortened the half ring 3 is mounted on a base 1 is movable, and shortened the semicircle of 5 based on 1 still. The optical axis of the radiation source 6 and the light receiver 2 intersect at the point of intersection of the axis of symmetry of the base 1 to the inspected surface of the object. On the base 1 by the monitored object surface 11 is installed a support 14 of regulation of the distance between the substrate 1 and the investigated surface of the object 11, which allows to focus the radiation source 6 and the light receiver 2 in the investigated point non-planar surface of the object.

The device for determining the angular distribution of the radiation reflected from the test object surface, predominantly flat surface in figure 1 is as follows.

At any position of the rolling element 8, which is fixed to the radiation source 6, a stationary half ring 5 produce focusing of the radiation source 6 to the point of intersection 10 of the axis of symmetry 4 with the surface of the object 11, and at any position of the rolling of the ring 3 and the rolling element 8, which is fixed to the radiation receiver 2, produce f is kucerova of the radiation receiver 2 in the point of intersection 10 of the axis of symmetry 4 with the surface of the object 11. Then for a fixed position of the rolling element 8, which is fixed to the radiation source 6, and a fixed position of the movable elements 8, which are movable semi-circle 3, at different positions of the rolling element 8, which is fixed to the radiation receiver 2, the movable semi-circle 3 measure radiation from the radiation source 6 is reflected from the point of intersection of the 10 axis of symetrie 4 with the surface of the object 11. Radiation is converted by the transducer radiation in photo libraries 15 and is processing the electrical signal processing unit 13. Then with the help of mobile elements 8 with the actuator 9 moves the movable semi-circle 3 in a new position relative to the axis of symmetry 4 and the base 1 and repeat the measurement at different positions of the rolling element 8 with a fixed radiation receiver 2. The measurements are repeated to obtain three-dimensional angular distribution of radiation from the radiation source 7 is reflected from the point of intersection of the axis of symmetry 4 with the surface of the object 11 in the whole angular range of the reflected radiation.

The work of the rolling element 8 with the actuator 9 in figure 2 is as follows. When enabled, the actuator 9 is rotated, the associated worm 20 screw connection 16 is relatively dignaga half rings 5 and moves the movable element 8 along the stationary half rings 5. Similarly the movement of mobile elements 8 along the rolling of the ring 3 and along the base 1.

The device for determining the angular distribution of the radiation reflected from the sample surface (option), mostly non-planar surface, figure 3 is as follows.

With the help of supports 14 installing the base 1 over the non-planar surface of the object 11 so that the optical axis 7 of the radiation source 6 was crossing the optical axis 12 of the radiation receiver 2 at the point of intersection 10 of the axis of symmetry of the substrate 1 with the surface of the object 11. Next, the operation of the device is similar to the operation of the device to a flat surface of the object.

In the operation of the device determine the spatial angular distribution of the radiation reflected from the intersection point 10 on the surface of the object 11 at different positions of the radiation source 6 on the stationary half ring 5.

Thus, the proposed device, in contrast to the known analogs and prototypes that will allow you to measure the angular distribution of the radiation that is reflected directly from the surface of an object, regardless of the shape of the surface. This will not be required to produce samples of the measured object and this can sometimes spoil an expensive object. This will be taken into account when measuring the potential change is of the optical properties of the object surface, which are connected, for example, by deposition of soot or oxidation, which will reduce the time, cost and increase the accuracy of the measurements. The need for measurements using the proposed device occurs in cases where the nature of the reflection surfaces of objects differs from purely purely diffuse or specular reflection.

1. Device for determining the angular distribution of the radiation reflected from the test object surface containing a radiation source, a radiation receiver, the transmitter radiation in the photocurrent and the processing unit, characterized in that the device comprises a base, made in the form of a ring, on which there is fixed a semi-circle, the ends of which are fixedly mounted on the base, and movable semi-circle, the ends of which are mounted on movable elements, actuators and are able to move along the ground, both half rings have the same diameter as the diameter of the base, perpendicular to the plane of the ring and are located opposite the analyzed the surface of the object, with both half rings also have movable elements with electric actuators, with one of the movable elements mounted radiation source, and the other with the radiation receiver and the radiation source and the receiver emitted is guided in the direction of the investigated object surface, and the optical axis of the radiation source and the radiation detector intersect at the point of intersection of the axis of symmetry of the base with an investigated surface of the object.

2. Device for determining the angular distribution of the radiation reflected from the test object surface (option)containing a radiation source, a radiation receiver, the transmitter radiation in the photocurrent and the processing unit, characterized in that the device comprises a base, made in the form of a ring, on which there is fixed a semi-circle, the ends of which are fixedly mounted on the base, and movable semi-circle, the ends of which are mounted on movable elements, actuators and are able to move along the ground, and the two half rings are made shorter, and the distance between the ends of each shorter half rings of equal diameter at the base, shorter half perpendicular to the plane rings and are located opposite the investigated object surface, with both shorter half rings mounted movable elements, actuators, and on the ground by the monitored object surface mounted bearing adjusting distance between the base and the investigated surface of the object, while on one of the movable elements mounted source of the infrared radiation, and on the other the radiation receiver and the radiation source and the radiation detector is directed towards the sample surface of the object and the optical axis of the radiation source and the radiation detector intersect at the point of intersection of the axis of symmetry of the base with an investigated surface of the object.



 

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