WO2003060554A1

WO2003060554A1 - Indicator of optical and optoelectronic objects

Info

Publication number: WO2003060554A1
Application number: PCT/RU2002/000450
Authority: WO
Inventors: Nikolai Nikolaevich Slipchenko; Michail Ilich Krimski
Original assignee: Nikolai Nikolaevich Slipchenko
Priority date: 2001-12-27
Filing date: 2002-10-14
Publication date: 2003-07-24
Also published as: RU2001135381A; EP1459096A1

Abstract

The invention relates to the field of instrument engineering and it can be used as an indicator unit for detection of optoelectronic objects upon getting into their field of view, for instance, search of microscope objectives into the premises (distance is equal to 3-30 m), for bearing of optical and optoelectronic objects for aiming, observation and to guidance in the surroundings (at the distance of up to 1,000 m), for installation into the photo and cine techniques in order to register optical means that carry out unauthorized observation. The purpose of the invention is expansion of the sounding's range that is reached by the emission source made as an illuminator, comprising the alogen lamp with vertical filament, the concave mirror catching the emission scattered by lamp, as well it is furnished by the lens- the lamp is set into its focus, and the beam splitter, that is set at the illuminator's optical axis; the receiver is made as the aligned pant/tilt mirror, telescope and observer's eye: moreover, the optical axes of the illuminator and the receiver are parallel; also the receiver of the indicator is made as the avalanche photodiode and the receiving lens; while, photodiode is set in the receiving lens focus.

Description

INDICATOR OF OPTICAL AND OPTOELECTRONIC OBJECTS

BACKGROUND OF THE INVENTION

The present invention relates to instrument engineering and it can be used as an indicator unit for detection of optoelectronic objects upon getting into their field of view; for instance, it can be used for search of microscope objectives inside premises (within the distance of 3-30 m), for bearing of optical and optoelectronic objects for aiming, observation and guidance in the surroundings (at the distance up to 1 ,000 m), for installation into photo and cine techniques in order to detect optical means which carry out unauthorized observation.

DESCRIPTION OF THE PRIOR ART

"Laser System for the detection of optoelectronic objects" (Russian Patent N 21 13717) is considered the prior art of the invention; it consists of a frequency-impulse laser with an objective, a photo receiver with an objective, a narrow-band interference filter, an optoelectronic object, a platform rotating round a vertical axis, a threshold device of the intensity of laser emission, a counter of impulse emission, a sensor of the angle position of photo receiver and frequency-impulse laser, a coordinates determining unit and a sound- alarm device. The drawback of this laser System for detection of optoelectronic objects is an impossibility to use it for object's detection in a wide range of emission spectrum, as well as it is sophisticated in exploitation and it is expensive.

SUMMARY OF THE PRESENT INVENTION

The general purpose of the invention is an expansion of range of the sounding's spectrum and also a simplification in use and reduction of cost price.

This is achieved by incoherent emission with a specially made diagram of directivity [The field of emission is a square; the spread may vary depending on the task defined. If the distance for search is huge, e.g. 1 ,000 m, the emission is collimated mostly so that the linear dimensions of square do not exceed ~3m right in the whereabouts of object (that is the spread is ~3 x 10^"3 rad); if the distance for search is small, e.g. up to 20 m (during the search of microscope objectives in a room), the spot in the whereabouts of object should be chosen bigger in order to catch the bigger square, that is why the spread is to be ~(7-8), that is -0, 15 rad], which sounds the space, and if there are any optical and optoelectronic objects there, the emission, that has got to the limits of their fields of view, should "glare back", while the maximum intensity of the reflected signal is in the direction of the optical axis of this object.

The best effect is reached in a so-called "duel situation" (when the emitter and the "glaring object" are put face to face). That is why, if the eye of an observer (operator) equipped by the observation optical means (for instance, a spy-glass or a sight) is at the axis of light scattering, the distance from the emission object, surpassing in intensity the threshold of sensitivity of the eyes (just after multistage focusing by the help of an observation optical means and by an eye), is registered, as well as the "glaring object" itself, as the visual fixation to the environment takes place in the situation - the eye "sees" the landscape through the ocular.

It should be emphasized that the eye and the observation optical means (a spy-glass or a sight) can be changed for the receiver of optical signals (for instance, an avalanche photodiode or a pin- photodiode) and the receiving lens accordingly, moreover the receiver is set in the focus of the receiving lens. Then the indicator becomes invisible, and as it is equipped with a signal processing unit, that is why it gets an ability to define coordinates of "glaring objects" and it is more useful to settle the tasks of protection of buildings, special teams in march, and there is no need in any observer (operator) to take part in the procedure.

BRIEF DESCRIPTION OF THE DRAWINGS

Other advantages and features of the present invention will now be described in greater detail with reference to an exemplary embodiment, which is intended to explain and not to limit the invention, and is illustrated in the drawing, that is FIGURE 1 shows the optical scheme of the indicator's design with visual fixation to the environment. DESCRIPTION OF THE PREFERRED EMBODIMENT

An indicator of optical and optoelectronic objects comprises an illuminator (1), which consists of:

- the halogen lamp with vertical filament,

- the concave mirror, catching the emission from the lamp;

- the lens, in which focus the lamp is set;

- the beam splitter 50x50 (2), which is at the optical axis of illuminator;

- while the pan/tilt mirror (3) and

- the telescope (4) and

- the eye (5) of observer are set parallel to the optical axis of the illuminator and the "glaring object" (6).

The device performs in the following way. The incoherent emission from the illuminator (1) sounds the space and if detects the "glaring object" (6), the emission of maximum intensity and reflected from the detected "glaring object" goes at the optical axis of this "object" and through the beam splitter (2), the pan/tilt mirror (3), the telescope (4) and then it is fixed by the observer's eye (5).

The accomplishments of the Indicator of optical and optoelectronic objects are set forth:

1. Differing from the laser detection systems, which sounding emission is narrow-band, and that means it may be avoided by a filter, the incoherent system gives the wide range of spectrum, including the visible one, that can not be avoided, otherwise the "glaring object" itself becomes "blind". 2. The slope of the "glaring objects" in the variant of incoherent emitters surpasses the angle of search of laser systems, as their emitter diagram is wider.

3. The indicator is much cheaper and it is easier in operation.

4. The laser emission band changes its position to that part of spectrum, which is more long-wave with the step of 2 nm/°, but the incoherent light does not: image-converter tubes and photo receivers change their sensibility according to the ambient temperature, but not the eye does not change it; finally, the power supply of lasers, image- converter tubes and photo receivers have to provide high stability of power parameters, moreover they are really sensitive upon subzero temperature; the source of incoherent light is less fastidious in this case.

Claims

1. The indicator of optical and optoelectronic objects, comprising the emission source and the receiver, differing from the prior art device by that the emission source is made as illuminator for the sake of expansion of the range of sounding spectrum, which consists of the halogen lamp with the vertical filament, the concave mirror catching the emission being scattered by lamp, also it is provided with the lens, in which focus the lamp is set, and the beam splitter, which is set at the optical axis of the illuminator; the receiver is made from all the aligned pan/tilt mirror, telescope and eye; while the optical axes of the illuminator and the receiver are parallel.

2. The indicator is shown at FIG. l ., its receiver is made as the avalanche photodiode and the receiving lens, while the avalanche photodiode is in the focus of the receiving lens.