DEVICE FOR LIGHTING

® RK PATENTSCHRIFT© No. 351839. (§) patentees: VEB COLLECTIVE COMBINE NAGEMA DRESDEN GERMAN DEMOCRATIC REPUBLII @ article: DEVICE FOR LIGHTING ®Zusatz to patent No. @Ausscheidung out: @ßpAngemeldet to: i^jq oi 10 “170/78 (|3) Exhibition priority: (§) ©© Unionspriorität: GERMAN DEMOCRATIC REPUBLIC (DD) 1977 02 24 197534BEANSPRUCHT @ beginning of the patent duration: 1979 Ol 15 longest ones possible duration: t spent to: 1979 08 10 inventors: @) Dependence: @ block letters, which were considered for the demarcation of the state of the art: Oi CO 00 tHIQ 00 < _ 2 - Nr.351839 the invention for lighting can be used everywhere, where an irradiancy in the object level is scanned visually or photoelectrically and the available in each case irradiancy is a measure for one characteristic which can be determined. Operational areas can be on photoelectric scanning which are based digital away and Winkelmeßsysteme, on interferentieUer basis working 5 direct digital force, away and analysis measuring systems, spectral, fluorescence and Zweistrahlphotometer as well as lighting mechanisms for microscopes. Characteristic of the well-known technical solutions in conventional lighting mechanisms is abgebüdet the shining surface of the source of light (shining sheet, spiral) by the KoUektor on itself a Zwischenblende present between KoUektor and condensor lens. Object level is that level, into which the field screen is abgebüdet by the condensor lens, whereby as field screen the version of the collector or a screen in proximity of the collector works itself. In the object level by the lighting mechanism an irradiancy is produced. The irradiancy in the object level is dependent under anderm one the shining surface of the light queues becoming effectively of the radiance in the zwischenblende. With the well-known technical solutions the light depressing opening is in the Zwischenblende - in the following only as Zwischenblende designation - when circular opening ausgebüdet, on which the shining surface of the light queues is so abgebüdet that their Büd is larger equally large or than the Zwischenblende. On misalignments of the Budes of the shining surface opposite the Zwischenblende this will become either no longer fully illuminated or it other two dimensional elements of the shining surface with other radiance effectively. In particular it is when using Quecksüber down and high pressure vapor lamps as sources of light in such lighting installations due to these lamps own the Bogenmstabilitäten, caused by the fact that the point of withdrawal of the streamer walks at both electrodes during the lamp enterprise to count in principle on local misalignments of the Budes of the shining sheet opposite the Zwischenblende. The knowledge of these Nachteüe of such lamps led to it that with some these lamps the shining sheet is led by two screens, in order to reduce the local emigrating of the same. Misalignments of the. Budes of the shining surface opposite the Zwischenblende cause thus with conventional lighting mechanisms changes of the radiance in the Zwischenblende and concomitantly changes of the irradiancy in the object level and can therefore to measuring errors or to the loss of the measuring system or to high adjusting expenditure of the source of light opposite the Zwischenblende lead or special measures to the position protection of the source of light opposite the Zwischenblende or a special controlling of the opening of the Zwischenblende necessary make. A goal of the invention it is therefore the goal of the invention of creating a such lighting mechanism with when using sources of light with shining sheet the irradiancy in the object level is constant. to see to produce 35Darlegung nature invention task invention is in it, with lighting mechanism, independent of relative misalignment Budes shining sheet opposite Zwischenblende in object level constant irradiancy, as Zwischenblende so arranged is that it dips the headlights the Büd of the shining sheet only teüweise and the direction, in which this Abbiendung 40 takes place as a function of the Strahldichteverteüung the shining surface is in such a way selected that with Relatiwerlagerungen between the Büd of the shining sheet and the Zwischenblende in this direction and perpendicularly to it the radiance in the Zwischenblende and concomitantly the irradiancy remain in the object level constant. According to invention the task is solved by use of a spaltförmigen Zwischenblende, 45 whereby the longitudinal axis of the gap in x-direction is appropriate and the gap has here the width b and accordingly in y-direction the height of h, so that b > h well. The longitudinal axis of the shining sheet is abgebüdet into the y-direction and the Büd of the shining sheet has the height h' and perpendicularly to it the width b' and it is h' > b', h' > h and b1 here < b, so that those darsteUt width b' the Budes of the shining sheet the delimitation of the shining surface in x-direction in the Zwischenblende. In x-direction so the radiance of the shining sheet is strongly place-dependent. Since however the gap width is substantially larger b than the width b' the Budes of the shining sheet, the radiance becoming effectively in the Zwischenblende is constant with Relatiwerlagerungen in this direction between the Büd of the shining sheet and the Zwischenblende.

- 3 - Nr.351839 in y-Kichtung, i.e. toward its longitudinal axis, is dipped the headlights the shining sheet by the gap height h. In this direction the radiance of the shining sheet is constant, so that with relative relative in y-direction between the picture of the shining sheet and the Zwischenblende the radiance becoming effectively in the Zwischenblende does not change likewise. 5Ausführungsbeispiel the invention is more near described below by an example. The associated design shows a lighting mechanism, consisting of source of light with shining sheet - 1, collector - 2 - with field screen - 3, spaltförmiger Zwischenblende - 4 - and condensor lens - 5, as it is used for example for the lighting in interferometers. In the level of the Zwischenblende --4-- by the collector - 2 - the picture - 6 - of the shining sheet - 1 - is produced. The picture - 6 - of the shining sheet - 1 - has those width b' and the height h'. the Zwischenblende - 4 - is shown by the condensor lens - 5 - after infinite. In addition results from the illustration of the field screen --3 - by the condensor lens ~5~ their picture - 7. If the shining sheet shifts in x-direction toward 1 ', then its picture is with 6 ' and the radiance becoming effectively in the Zwischenblende - 4 - remains so long constant, as the edges of the picture - 6 ' - of the shining sheet are within the gap width b. Misalignments of the shining sheet in y-direction over ± s cause likewise no changes of the radiance in the Zwischenblende, since in this direction the radiance of the shining sheet is constant. Summary it is suggested a device for lighting, which is applicable in interferometers, spectral, fluorescence and Zweistrahlphotometern as well as in lighting mechanisms for microscopes and from a source of light with shining sheet, collector, field screen, Zwischenblende and condensor lens exists. The shining sheet of the source of light is shown by the collector on the Zwischenblende. A goal of the invention is it to produce in the object level a constant irradiancy. It is present a horizontally arranged, spaltförmige Zwischenblende, whose width exhibits a multiple the width of an actually well-known rod-shaped source of light, which is before-regulatory perpendicularly to the longitudinal axis of the spaltförmigen Zwischenblende and whose height corresponds to a same multiples of the height of the spaltförmigen Zwischenblende. Between the rod-shaped source of light and the spaltförmigen Zwischenblende thereby a collector with a field screen is arranged.

PATENT CLAIM device for lighting, consisting of a source of light, whose shining surface is shown by a condensor lens by a collector on a Zwischenblende and this, by it ge marks that a horizontally arranged, spaltförmige Zwischenblende (4) is present, whose width a multiple the width of an actually well-known rod-shaped source of light (1) exhibits, which perpendicularly to the longitudinal axis of the spaltförmigen Zwischenblende (4) is before-regulatory and whose height a same multiples of the height of the spaltförmigen Zwischenblende (4) corresponds, whereby between the rod-shaped source of light (1) and spaltförmigen Zwischenblende (4) a collector (2) with field screen (3) 40 is arranged.

(Hiezu 1 sheet design) pressure: Ing.E.Voytjech, Vienna AUSTRIAN PATENT OFFICE spent on 10 August 1979 1 sheet patent specification No. 351,839 Kksse: 42 h, 23 Int.Cl2.: G02BX