DE1690346U - DEVICE FOR GENERATING POSITIVE ILLUMINATED IMAGES. - Google Patents

Description

3a, ~ 534Τ · - "" · ■; -. ■ '"* -Stuttgart» November 9, 1954

^ ΛΙ ^ ν ^ - ^^ ϊ - *; ^ -: · ;: .3eschreibiing-2; to visit

^ X

! Erzeiigiing'-posltiiTer

as positive

^ i .'.-'-- ΐ ^ ί'ί.Ι ';' ^ i ^ er ^ - ^: diaxUir ^ · visible ^; su make 'that only «a phosphorescence«

short-wave: {ultraTiOletten) uges eighth ~ stimulated and then the negative with long

liicht on this excited neon squint 'aufkopier * -or projected onto -will .. Such luminous images can be in darkened or largely darkened hems to be considered for some time; however, they sound proportionate quickly

2u such direirten visualization of a Se ^ atiirbildes as ^ ositiT with a grace enabled phosphor layer is already vrarden Torge hitting while the Jlnregung of! Phosphor layer or aufzukopieren the -JTegativbilfi this with tilgendem, long-wavelength light * to project. Such luminous images can be observed over a long period of time. An essential part of this process consists in the fact that one is dependent on a very special structure in order to carry it out be agreed that no undesired mutual interference

flow takes place. But are the excitation and eradication properties - As in the case of phosphors, the pail is usually very different from one another, so there is a perfect positive fluorescent image does not materialize. Since, however, for the image structure, especially with regard to the reproduction of the sub- When considering other properties of the phosphor, it is important to choose a suitable phosphor material Extraordinary loan to carry out this procedure difficult

To in the selection of the phosphor material in the above sense not to be restricted, according to the fire, the ostracism and excitation rays or at least one of both types into one constant change through the interposition of suitably designed sector diaphragms act on the fluorescent layer in such a way that that the eye of the observer receives a uniform positive image impression. " One can proceed in such a way that the first a short-wave excitation pulse of such intensity and duration that the luminous layer is excited to maximum glow * Then copied or the negative to be reversed is projected with a long-wave eradication pulse of such intensity and duration that it is possible to record of the radation differences one picture element maximum Negative transparency causes the corresponding picture element of the luminous layer to extinguish. These processes repeat themselves as often as you like. On the other hand, you can also apply the negative by means of a continuous pulse to the, for example, not yet fluorescent layer made to glow with long-wave illumination light on project and adjust the excitation light

to the desired & radation reproduction in 3? orm continuously successive., Let coordinated, short-wave excitation impulses act on the fluorescent layer »

is rare in itself Pail a ausserordentlieh strong "leuchts.toffschieht fcilgungsfähigen gate. so scan also be chosen the -umgekehrte W-eg, the Uegativ with a constant excitation radiation" preferably regelbnässig changing IiI-supply radiation to the phosphor layer to project.

Instead of an externally excited phosphor layer or ^{1 in} addition to it, a self-luminous phosphorescent layer can also be used in an embodiment of the invention. -be used in which the excitation, "or the additional excitation occurs through the emission of a radioactive substance added to the layer * Bas Segativ can either be projected onto T3 or

A transparent or a non-transparent layer can serve as the fluorescent layer. In the first pail the excitation and deletion rays on the one hand and "the observation on the other hand" hit the phosphor layer from different sides. However, it is also possible to have both types of radiation act on the layer from different sides, whereby the observation of the light image can be carried out using a selective mirror, preferably an interference mirror, which is designed in such a way that the visible rays of the light image in the direction of observation are reflected, while, depending on the arrangement, the excitation and / or absorption rays pass the mirror unaffected.

Such a selectively acting mirror can also be used in different ( bond with a non-transparent! luminescent layer is used be, with the excitation, the pictorial eradication and the observation from one and the same side of the non-transparent Be done layer ago.

The exposures (I ac t) of the excitation and elimination radiation can be matched to one another as required * These can, for example can be influenced in the desired sense by rotating or oscillating sector diaphragms, with the passage openings the apertures can be adapted to the respective exposure

The drawing shows several examples *

According to Tig. 1 is the phosphorescent layer 1 by the radiation 2 with the interposition of the sector diaphragm S _- . stimulated to glow. This glow is extinguished by the filing rays 3 "which hit the luminous layer 1 with the interposition of the negative 4 and the sector diaphragm S", corresponding to the differences in brightness of the negative, so that a positive luminous image is created in a known manner, which by means of the visible radiation 6 over the mirror 5 is thrown back to the observer. The mirror 5 has a selectively acting, reflective layer which is permeable to long-wave 3? Elimination rays, you. In contrast, radiation lying in the visible spectrum is reflected ·. This selectively acting reflective layer is expediently designed as a suitably applied interference layer

According to FIG. 2, the excitation radiation 2, which is generated in aen light sources 8 and 8 ', with the interposition of the SeM gate diaphragms S. and S ^, is thrown onto the fluorescent material layer 1 from the same side as the radiation rays 3 that pass through the projection lens 7 can be projected onto the luminous layer 1 after passing through the negative 4 and through the sector diaphragm S _2. The observation

Claims (1)

ΕΑ.670173Ί11Ι ^Γ Λ "Tung - takes place by means of the radiation 6, when the fluorescent material is chi eh" is transparent »"! If this is not the case, the of the positive luminous image according to Pig. 3 lait the help of one selectively acting mirror according to Pig. I will be made-. 1, device for the spontaneous generation of positive Xehntbilder, thereby . characterized that the IDilgungs ^ md the excitation rays or one of both types. by, interposition of suitably trained Sector diaphragms in this way on the phosphor layer are thrown in constant ¥ achsel that a long lasting visual impression is created * 2 · Device according to claim 1, characterized in that when the two radiations act alternately on the fluorescent layer their frequencies are matched to one another. 3, device for practicing the method according to claim 1 or 2, characterized in that they are used to separate the visible ones used for observation and for eradication and / or excitement Invisible rays selectively acting, reflective planes, preferably provided with interference layers are" 4 _a device according to claim 3- »characterized in that a single radiation source is used for the excitation and elimination rays, the light current of which is divided into differently filtered bundles of rays * 5 · Device according to one of the preceding claims, characterized. characterized in that a phosphorescent layer mixed with radioactive substances serves as the phosphor layer Radiation replaces or * supplements the pathogen rays.