RU2413475C2 - Surgical light with controlled optical radiation - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: invention refers to medical equipment, namely to surgical lights. A light comprises main and supplementary light diodes mounted on a body, distributed on its surface and grouped by the main and supplementary light diodes, and a light field control. The groups of the main and supplementary light diodes are coupled both to each other, and to the light field control. The main light diodes are fixed on the body of the light with their optical axes transecting an axis of the light in the centre of a light spot, while the supplementary light diodes are fixed on the body with their optical axes creating an annular concentric light spot surrounding a main spot.

EFFECT: invention allows higher fixation reliability of the light and maintained higher luminous efficacy.

3 cl, 3 dwg

Description

The invention relates to medical equipment, namely to a lighting device based on LEDs with light emission control

Since LEDs have come into everyday practice, lighting equipment using lamps made up of LEDs has had particular advantages compared to existing fluorescent lamps, incandescent lamps, etc., consisting in their long service life and low power consumption.

Lighting devices with LEDs used as searchlights or traffic lights are described in detail in RF patents, such as No. 2123633, No. 2151473, No. 2153623, No. 2202731, No. 2227245, No. 2244870, No. 22448999 and others. They are intended for lighting distant objects, for use in all-round visibility systems and lighting fixtures, where the creation of a maximum level of illumination inside the working area and maintaining a constant diameter of the light field is not required.

However, to date, LEDs have not been widely used in surgical fixtures, which require a shadowless effect and high luminous efficiency due to high illumination and uniform distribution of light flux inside the working area. The luminous flux in surgical fixtures is created by adding the luminous flux of individual light-optical modules at a distance of 0.7 m - 1.4 m from the housing. Inside the working area, a maximum level of illumination is created and a constant diameter of the light field is maintained. In addition, it should be possible to control the diameter of the light field. To do this, surgical lights are equipped with light field control devices, which are mainly rotary mechanical devices.

Known surgical lamp with a mechanism for regulating the size of the light field, made in the form of a rotary mirror, reflecting the light beam from the light source (Lamp brand VN-500 company FAMED (Poland)).

A well-known lamp has a mechanism for controlling the size of the light field is not effective enough due to the low synchronization of the rays, the use of excess reflective surface, and also has large overall dimensions.

Known surgical lamp, in which the adjustment of the lighting system is carried out by moving the lamp relative to the reflector (surgical lamp CP-6; passport 66-00-00PS).

The known lamp can only adjust the magnitude of the light spot of small depth, and also has large overall dimensions.

Also known is a surgical lamp with light emission control, comprising light-optical elements fixed in the body in the form of halogen lamps and a light field adjustment device, including a support rod mounted on the main axis of the lighting system, in the upper part of which is a detachable ball bearing with six degrees of freedom, means for rotation of the light-optical elements in the form of a multi-cam, located under the ball bearing and interacting with the vertical leads of the light brackets optic elements interacting with the alignment pins (Cl. RF No. 2149309, IPC F21V 14/02, F21V 21/29, F21W 131: 205, publ. 05.20.2000).

In the known technical solution, the control of light radiation is carried out by means of mechanical means, providing rotation of the light-optical elements having a complex structure, large overall dimensions and reliability of which decreases as the mechanical components wear.

The closest in technical essence to the claimed device is an operating lamp containing light-optic elements mounted on the housing, hingedly connected to each other, and a light field control device by mechanical means (application for EP No. 1568935, IPC F21S 8/00, F21S 2/00, publ. August 31, 2005).

The famous lamp has a high luminous efficiency. However, the control of light radiation in the known lamp is carried out using mechanical means that ensure the rotation of the optical elements relative to each other, the reliability of which decreases with the wear of the mechanical components.

The invention is aimed at improving the reliability of surgical fixtures while maintaining high luminous efficiency and is solved as follows.

According to the claimed technical solution, the light-optical elements are made in the form of main light emitting diodes dispersed on the surface of the body of the lamp, and additional light emitting diodes placed between the main light emitting diodes and having a spatial orientation different from the spatial orientation of the main LEDs, while the main and up olnitelnye LEDs arranged in groups, the groups of the main groups of LEDs and other LEDs are connected together and to the device for controlling the light field.

In this case, the main LEDs are mounted on the lamp housing with the intersection of their optical axes with the axis of the lamp in the center of the light spot.

Moreover, additional LEDs are mounted on the housing with the formation of their optical axis of a concentric light spot in the form of a ring around the main spot.

In addition, the light field control device includes a control unit, to which groups of primary and secondary LEDs are connected via regulators, each of which is connected to the power supply.

The installation of the main LEDs dispersed on the lamp housing, and the additional LEDs between the main LEDs, as well as the combination of LEDs in groups and the different spatial orientation of the groups of main LEDs and additional, allows electronic adjustment of the diameter of the light field, which increases the reliability of the lamp.

The implementation of the light field control device, consisting of a control unit, to which groups of primary and secondary LEDs are connected via regulators, each of which is connected to a power supply unit, allows you to adjust the balance of currents passing through the groups of primary and secondary LEDs, providing redistribution of the light flux inside the light field, i.e. allows electronic control of the light field, increasing the reliability of the lamp.

The presence of significant features distinctive from the prototype allows us to recognize the claimed device as new.

The prior art does not reveal technical solutions that match the distinguishing features of the claimed object, therefore, the claimed device meets the criteria of an inventive step.

The present invention will be better understood when considering the above detailed description together with the accompanying drawings of the present invention, and this description should not be construed as limiting, but only as an example to explain and understand the invention.

Figure 1 - arrangement of the primary and secondary LEDs on the surgical lamp.

Figure 2 - the course of light rays in the lamp.

Figure 3 - device for adjusting the light field of a surgical lamp.

The main 2 and additional 3 LEDs are attached to the housing 1 of the lamp, combined in groups. The main LEDs 2 have a light beam width of 6.5 ° and are focused so that their optical axes converge in the center of the light spot at a distance of 1 m from the surface. Additional LEDs 3 have a light beam width of 10 ° and are scattered between the main LEDs 2, and their optical axis form a concentric light spot in the form of a ring around the main light spot, with a radius of 100-200 mm from the center of the spot, which is optimal for surgical lights. The light field control device consists of a power supply 4, a control unit with a microcomputer 5, digital-to-analog converters 6a and 6b, current generators 7a and 7b.

When the luminaire is connected to the mains supply, the power from the power supply unit 4 is simultaneously supplied to the groups of main LEDs 2 and additional LEDs 3. If necessary, a large area of illumination (with extensive wounds) includes groups of main 2 and additional 3 LEDs. For deep wounds, when a small light spot is required, only groups of the main LEDs 2 are turned on. For endoscopy, only the illumination of the area where the operation is performed using the endoscope is necessary, therefore, only groups of additional LEDs 3 are turned on. In these cases, using the microcontroller with the control unit 5, digital-to-analog converters 6a and 6b and generators 7a and 7b carry out the adjustment of the balance of currents passing through the groups of the main 2 and additional 3 LEDs, providing redistribution of light th stream inside the light field.

The invention can be used in medical equipment.

Claims (2)

1. A surgical lamp with light emission control, comprising the main 2 and additional 3 LEDs mounted on the housing 1 of the lamp, distributed on its surface and combined into groups of main and groups of additional LEDs, and a light field control device, and groups of main LEDs 2 and groups of additional LEDs 3 are interconnected and with a light field control device, characterized in that the main LEDs 2 are mounted on the housing 1 of the lamp with section of the optical axes with the axis of the lamp in the center of the light spot, and additional LEDs 3 are fixed on the body 1 with their optical axes form a concentric light spot in the shape of a ring around the basic spot. 2. The surgical lamp according to claim 1, characterized in that the light field control device includes a control unit with a microcontroller 5, to which groups of main LEDs 2 and groups of additional LEDs 3 are connected through digital-to-analog converters 6a and 6b and current generators 7a and 7b , each of which is connected to the power supply 4.

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