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PHOTOGRAPHICS WITH THE INVERSE OF THE SIGN
ELECTRIC POWER

Dr. P. Bobonich

Project focus

The photodetectors I offer you have really new properties. I have fabricated samples of them, made in the form of ready transistors in the package type TP 32 and TP 29 (former Soviet production) or R-32 and R-13 (analogue international - it is possible).

The region of spectral sensitivity is 0.3-1.2 nm (for silicon samples). For other samples, the spectral sensitivity region is different depending on the substrate.

A) When exposed to a photodetector (when operating in a photovoltaic (gate) mode, when the base is "hanging"), a change in the emf from +300 mV to -150 mV with a value of 0 mV occurs at a value near 550 nm by monochromatic radiation from the ultraviolet to the infrared spectral range .

B) Similarly, the EMF sign changes within the same limits when exposed to radiation (for example, at 628 nm) by the collector and emitter of the phototransistor. Thus, when the collector is exposed to radiation of the same wavelength, a positive sign of the photo-emf is induced, and the negative sign of the photo-emf is emitted to the emitter. The value of the photoelectric power depends on the value of the illumination value (in lux). Similarly, a change in the sign of the photoelectric power occurs when the photodetector is excited with IR radiation (from IR LEDs).

C ) when registering radiation through dielectric sheets (an example is given by us in the previous letter) and the sign of the photoelectric power is changing.

D ) If a hand is placed on the path between the radiation source (LED) and the photodetector, then the photoelectric power is registered when they move along the brush. In this case, when there is no object between the source-receiver system, the photo-emf sign is positive, and when the object is placed, the sign changes to negative.

Thus, we patented the photodetector control methods (two), a differential optocoupler, a differential photocell, a phototrigger, a photoviator, an optical infrared tomograph, a sensor for recording dielectric materials, and a sensor for non-invasive measurement of blood glucose concentration. Both methods of controlling photocells are described and implemented as shown in Nos. A) and b) .

The differential optocoupler is made in the TP 32 package in two versions. The first option, when in the areas of the collector and emitter there are one AL102A (red) or IR LED AL106B. The second option, when two optical fibers, mounted at the input of the collector and emitter, are pulled outward. In this case, excitation of the optocoupler is carried out from the outside.

Phototrigger or photoviator is an element that makes it possible to control electrical devices in three stable states: the first state when an optical signal is applied to the collector and at the output we have a positive EMF sign, the second state when the optical signal is fed to the emitter and at the output we have a negative sign EMF, the third state when the optical signal is not applied to the collector or emitter. In known devices (see, for example: MI Elinson, Optoelectronics, Izd .: Knowledge, 1977, p. 45, Fig. 16), there are only two states, but also the use of two lasers in known devices increases the cost of manufacturing a phototriger .

The device for counting dielectric sheets has a line of proposed photodetectors and a line of LEDs or a wide-format IR emitter. With the help of the device it is possible to control the thickness of sheets or other materials in the conveyor mode. If the thickness of the material does not match, the machine stops or adjusts the thickness of the material. See item c) .

The optical infrared tomograph is: the first variant is a matrix of the proposed photodetectors and a common wide-format IR emitter, between which the biological object under study is placed, the second variant is a line of proposed photoreceivers, with which scanning is carried out across the width of the biological object. In this version, it is possible to use either a wide-format IR emitter or a line of infrared LEDs. The work of the tomograph corresponds to item d).

The sensor for non-invasive measurement of blood glucose concentration consists of the proposed photodetector and LED (preferably IR), between which the earlobe or finger is placed. Its work is based on the absorption of IR radiation in the blood and the registration of the transmitted radiation by the proposed photodetector, while the intensity of the transmitted radiation is proportional to the concentration of glucose in the blood. Option d).

The cost of photodetectors is not more than 1 $. The production of these photodetectors is possible within two to three months on the existing semiconductor production. The costs of reorienting their manufacture are minimal. Economic and material costs are optimal. The cost of assembling the various devices of which each of the proposed devices consists is known, and therefore does not require calculations, since we do not know their cost in the western market.

On the basis of these photodetectors, it is possible to manufacture other devices in which the principle of three stable states is used. All devices with these photodetectors can be patentable.

It is planned to patent these devices in Russia. We are doing normal business work with the Scientific Research Physico-Chemical Institute. L.Ya. Karpova, headed by pro-rector for science prof. Yu.Ya. Tomashpolsky.

We want to take advantage of the convective priority for obtaining international patents. Therefore, we decided to accelerate this work with the goal of patenting developments outside of Ukraine. Such work is possible with the participation of foreign partners in the United States. Japan, Great Britain, Israel (if you are interested in this problem), and other countries.

Our goal is to find people interested in purchasing a license for products or to become their patent owners. Other forms of cooperation are possible, which could be discussed in the process of correspondence or negotiations. With business proposals, we can demonstrate the work of photodetectors.

print version
Author: P. Bobonich
Senior scientific work Uzhgorod National University
PoBox A-3, Uzhgorod 88000, Ukraine
PS Material is protected

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