DE2302113C3 - Lighting attachment for photographic enlargers - Google Patents

Description

The invention relates to an illumination article for photographic Vergrößerü igsgeräte with a light source in whose beam path a ^{opii-: J} ULTRASONIC system is arranged with reflectors, in which a focal point of the virtual image of the light source and the lens is in its other focal point, In the: the beam path of the optical system there is a mirror subdivided into several stripe mirrors that can be changed in their reflection portion, using a source of diffuse light, consisting of an internally whitened hemisphere closed on the output side by a diffuser, which has a conical, reflective body on the inside .

Such a well-known lighting attachment allows a favorable partial; and stepless change of the luminance on the projection surface the enlarger with simple means. As a source of diffuse light, it is through the GB-PS 12 15 117 known, behind which the luminous flux to arrange generating lamp in the beam path a hemisphere, which is whitened inside; and thus diffuse reflected, and which has a diffuser at the exit and has a Rcflexionskegel inside.

The invention is based on the object initially specified Bcuchtungsaufsatz such to improve that the arrangement of the individual elements can be done in a space-saving manner and the operation of the device is simplified. A lighting device should also be provided within the lighting attachment be provided, which provides a continuously variable, diffuse light in color.

For you further development of the subject matter of the invention, the task is the control elements for the Streifenspiegelcl to store so that their respective Setting can be saved with little effort and reproduced as often as required and to simplify the shifting of the cover slides that change the reflection component of the strip mirror, because the individual slides are arranged very close to one another.

In accordance with the invention, this is achieved in that the conical body is made up of a highly reflective double cone, the walls of which are arched inwards are and terminate in a slender point that in front of the inlet opening of the hemisphere a color filler device, consisting of paa.Meise in dichroic filters that can be shifted along the beam path, is arranged and that the diffuse luminous flux on the Streifenspicge! falls, without / unii the lichlabseiligen Reflection on the negative immediately Illuminating mirror to cruiser :.

This measure not only achieves a small distance between the light source and the grazing mirrors, but also a reduction in the dimensions 'irr reflector':;, which can be curved, for example as an ellipsoidal mirror , uvil now a more favorable angle of reflection in 'Vn S <! Vi;: enspiegel vu: lies. The stiffer light inlet! in ι ;. · Ϊ́ Sfriicnspiegelii we !; ' is also advantageous m; ■ The front view of the cover slider read the adjustment path;: u.-, As a result of the use of the highly reflective double cone inside ti. In the reflective hemisphere, the reflection conditions within the same are considerably improved, so that a very homogeneous diffuse Lichistrom on the diffuser; H ^ lbkunei is obtained. This is because the slender partial mirrors pointing into the light outlet opening also reflect Liehisirahia which come from the rear wall of the hemisphere.
In the context of the invention, the described luminous flux course can be caused while maintaining all components in such a way that the luminous flux, which leaves the hemisphere acting as a source of diffuse light, is reflected by a mirror inclined in front of the partially coverable strip mirror and from these in turn to one curved mirror, from which it falls through the negative stage and the lens onto the projection surface. This embodiment also offers the advantage that it is now possible to place the projection lamp vertically and to direct its light horizontally into the already described diffusely reflecting hemisphere. The vertical arrangement of the projection lamp is known to have a favorable effect on the. Life of the filament.

In order to use the lighting attachment according to the invention, also color enlargements, vsiuft illuminate to be able to, becomes animal in further Invention between the light source and the diffuse reflecting hemisphere an adjustable color filter device arranged.

The luminous flux of the light source is concentrated by means of cold light mirrors and condenser lenses through an opening inside the wall d .-- inside whitened hemisphere on the tip of the hocineflektiercndeii thrown conical aluminum mirror. Before the opening of the hemisphere, i.e. still outside same, is the color filter device, the

as consists of filled bulkheads moved with ropes, the dichroic ropes running in pairs opposite and on top of each other Insert the filter with the transmission colors yellow, purple and blue-green into the beam path. the

■ c> on the slide that can be moved perpendicular to the light axis attached filter disks are advantageously arranged so that the Schhitenziiststellung occurring overlap increases continuously tmd only after passing through the full Zimell-

4S way is complete. This is called a square Filtering is always achieved when animals :: opposite one another Edges do not run parallel to each other !!

This offers the advantage that the emsielh scale to be provided on the racking device for the slide is wide; ! can be graded linearly.

The (i ^ pic-cone-shaped aluminum mirror reflects it his hemisphere pointing towards the entrance opening Kegel the still inhomogeneous, animal depending on the position Color filter partially colored light nmisum on the \ v, .- eat inside «ίικ! tier Ha'hkugel. ; m making it through ! lui.riacn .. ilin- and Hei u-llexion practically hoin ^ üenisiei; w: ni. before it, either directly dirvh put the hemisphere at its opening.

f> ij close!; ■! ■ -. ' Strcuscheihe after.; ■■ η occurs, oiic; ¹ but on the; ! niweg over the wider cone of the AIuij -. 'gel reflected on the lens wiul.

A particularly reliable nn. ':> etjucn '! to be - '..' ilirenuc (lesialtung cri'iihri das S-. lieriSjuegels) '■' .cm de

iJureli that the slide looks; two fixed, parallel walls g ^ fiili'-! Mnd, between which a parallel -u ilen \ V: in <! ^ N ^.> R_

slidable plate is arranged resiliently supported, whose through holes have an elastic lining and which can be shifted into two operating positions via an eccentric. that in one operating position the adjustment of the shafts can take place unhindered, while this Shafts in the other operating position due to the elastic pressure on one side of the elastic lining are fixed.

Now it is despite the simplest construction effort possible, the shafts of the slide with a single handle all in the once set To fix position and in this position the slide, so in the light intensity distribution determined thereby on the projection surface, several enlarged positives of the same negative one after the other expose.

Since it is advisable, the shafts of all slides before the illumination of a new negative to bring into a common starting position, in which all slides are completely withdrawn and the grazing mirrors are completely free in the luminous flux is, according to the invention, on the bedicmingsseitc the outer wall supporting the shafts is a freely movable shaft in the actuation direction of the shafts Arranged return plate, which engages with its holes over all shafts, the diameter these holes is larger than the diameter of the shafts, so that no contact between the Shafts and the hole walls takes place. So now you only need the freely movable one Perforated wall, which is expediently guided loosely in a rail guide, to be gripped and removed from the outer wall of the lighting attachment to move away all the shafts that are otherwise on the Iron heads with a diameter which is considerably larger than the diameter of the hole wear inside the perforated wall, pull into the common starting position. Then can the perforated wall returns to its normal operating position immediately next to the outer wall of the mirror system bring.

In the context of the invention, a spring system is used to simplify this actuation of the perforated wall provided between the perforated wall and the outer wall of the strip mirror system through which the perforated wall is returned to the last-mentioned operating position.

According to a further idea of the invention, the slide is on the inside of the outer, the shafts bearing wall a continuous layer of an elastic material arranged with their holes the shafts tightly encloses, whereby the bearing friction is increased, so that an unintentional Displacement of the shafts cannot occur.

The entire exterior mirror system of the lighting attachment is used in terms of manufacturing technology and in terms of universal applicability also for other devices, such as copiers, improved by the fact that all strip mirrors straight upper and lower delimitation edges preserved and in a horizontal position parallel to each other to be ordered. This formation of the stripe mirror also allows the slits between to keep the individual stripe speculum closer, whereby the reflectance of the entire stripe mirror surface is increased Another advantage that results from this training and arrangement of the strip mirror is that all Holes for the storage of the shafts of the slider have the same distance from each other and also can be arranged in parallel rows.

This also has a positive effect on the clarity and sensibility of the settings of the slider. The field in which the totality of all Shafts is arranged, corresponds essentially to a trapezoid.

Because of the very narrow slits between the individual strip mirrors, it is not possible to use the To arrange slides so that they overlap somewhat, which would ensure that no light can pass between two adjacent slides. Because now between two neighboring ones Sliders because of the necessary small distance between them always some light can penetrate between them, these are within the scope of the invention Slide set in rows on a gap, so that the slot in each slide in the adjacent row the lower row between two slides covered.

As much as possible about the loss of light through the slits between the individual stripe mirrors To keep it low, it is advantageous, according to a further inventive concept, to use these as surface silver-plated Train mirror. In this case, there can be no disruptive effects on the glass edges Refraction take place.

The assembly of the grazing mirror system including slides is made easier according to the invention by that the rear edges of the strip mirrors are beveled so that each gap between two adjacent strip mirrors terminates in a wider groove with sloping walls into which each slide is first pushed, and then by itself into the gap between the adjacent strip mirrors to slide.

For convenient operation of the slider, which is used for the finest possible partial coverage of the Strip mirror have the smallest possible width, resulting in a correspondingly small spacing of the Shafts inevitably result from each other, a device is provided according to a further idea of the invention, which is designed so that a permanent magnet can be displaced in a sleeve which is open at the end mounted and by a pretensioned, outwardly curved and externally accessible ribbon spring is held in the withdrawn position. Stretch by simply pressing the ribbon spring the same and at the same time pushes the permanent magnet so far forward that he something the front opening of the sleeve protrudes. In this position you can use the permanent magnet grab the head of any slider and pull outward. If you want to reverse Push the shaft of a slide into the device, so you only need the permanent magnet Put on the head of the desired slide, slide the shaft to the desired depth and then let go of the ribbon spring so that the permanent magnet is now drawn into the sleeve In this position of the permanent magnet, it no longer exerts any magnetic force on the one in front of it borrowed the slider's head, and you can there; Now remove the device without having reached it once « To change the position of the respective slide.

In a further embodiment of the invention, a special device is provided which allows any operating position of the total field of the shafts of the slide, so in which any number the slide protrudes more or less far out of the slits between the part spicgcln and excludes them from reflection to the desired extent, can store them reproducibly. According to an essential inventive concept, this device consists of a U-shaped frame, within its forward-angled walls a box plate suspended in one by springs middle layer is held, the box plate in its walls aligned bearing bores contains, which correspond in their position to the exact image of the field of the holes in which the shafts of the slide are mounted, with the plunger also being freely displaceable in these bearing bores are stored, which correspond in dimensions to the shafts of the slider and which are through an between the walls of the box plate arranged plate either clamped or released will. This last-mentioned plate for optional fixation or release of the plunger corresponds to FIG Structure and function of exactly those who have already discussed the Verstellbarkcit and Fixability of the shafts within the face mirror system has been mentioned

The reproducible storage of the respective operation of the system of the shafts of the slide Proceeds like this: First of all, the stems of the slider are in their instantaneous Operating position by lateral displacement of the mentioned plate, the holes of which are elastic have been lined, fixed. The lateral displacement of the plate can be done by means of a cam lever without further ado. After that all shafts in their current operating position have been fixed, the inventive Device for reproducible storage so brought up to the field of the shafts that each plunger before the head of the associated shaft comes to rest. All the tappets are located in the released position, so that they inevitably more or less as the device is brought up further be pushed back until they finally all assume exactly that relative position to one another, which prevails in the field in front of the shafts of the slide. Then the tappets of the Device clamped by means of the already mentioned, parallel to the walls slidable plate. Now the device can be removed and for the purpose of reproducing a new setting of the field Shafts of the slide are kept ready. Any other can then be used on the lighting attachment Sliding adjustments can be made. If you want the previously saved operating status the slider of the lighting assembly set up, like this is first the freely displaceable, arranged in front of the outer wall of the actuating device of the shafts Perforated wall pulled forward until all the shafts, which of course were previously through the clamping plate have been released, assume the outermost retracted position. After that the device is brought back to the field of the slide shafts for reproducible storage and the shafts by means of the more or less protruding tappets exactly into the original existing, saved position pushed. Now is the lighting attachment according to the invention ready for further enlargement work.

The drawing shows an exemplary embodiment of the invention, which is described below to explain further details of the invention.
It shows

ι «F i g. 1 the schematic representation of the for the Luminous flux guidance necessary elements of a lighting attachment according to the invention,

F i g. 2 shows a section through a further lighting attachment along the line I-I of Fig. 3,

) 5 Fig. 3 shows a section through the lighting attachment according to FIG. 2 along the bent section line 1I-II of FIG. 2, the left half of the illustration 3 shows a front view of the lighting attachment according to the invention and only the

ao right half of the Fig. 3 the mentioned, broken, Play cut,

4 shows a stepped sectional illustration of the actuating device of the strip mirror according to the invention N. stems, with the upper portion of FIG. 4 along the line III-III and the lower section is sectioned along the line IV-IV of FIG. 5 and the boundary between the two sections is shown by the dash-dotted line VI-VIl, F i g. 5 is a partial front view of the actuating device according to FIG. 4, with only the lower right Field of the representation according to FIG. 5 shows a partial view while the field marked V a section along the line V-V of FIG. 4, the field denoted by Vl a section along the line VI-VI. the field labeled VI 'is a section along the line VI-VI. however, the niehi arrested Position of the device, the field marked VIII a section along the line VIII-VIIl and Finally, the field marked IX reproduce a section along the line IX-IX.

6 shows the perspective illustration of an inventive Device for operating the slide, one of which is in

F i g. 7 has been shown in perspective, FIG. 8 is a perspective view of an inventive Device for reprodur. 1 storage of the various operating positions of the Totality of all slides,

F i g. 9 shows the side view of the device according to FIG. 8th, 10 shows a repetition of FIG. 4 on an enlarged scale Scale,

11 shows a repetition of FIG. 9 in enlarged view Scale, the actuating device for the slide according to FIG. 10 and the Gera!

for reproducible storage according to FIG. 11 are assigned to one another in such a way that the positions of the shafts de: Actuating device according to FIG. 10 takes over can be and have been taken over in the position shown, and

Fig. 12 is a front view of a color filter device tion.

According to FIGS. 1 and 2, the luminous flux the lamp 2 with the help of cold light mirrors 3 and the condenser lens 4 concentrated through the ÖS tion S of the wall 6, which is hemispherical and whitewashed on its inside, on the hochn inflected double cone 7 thrown.

609 612/2 *

10

surfaces of the condenser lens 4 and the opening 5 fixed, mutually parallel walls 21 and 1

* nnrt * 7? ? ^ fff ,,? _fi ^{Walk t} J \ _'o ^{n Fu, hrun} S ^{cn dei1 2I} "nd 22 slidable plate 13 ledernd from" and contains 67 running carriage _68 and 69, which is truncated. The mounting of this plate 23 is au ~ n _-_ and ubereinanderlaufcnde , dich- 5 Fig. 5. Then a tension spring 24 in

KSfl E70 τ, ^ 7 ^. Fig. 5 can be seen. Then e, ne Tinder 24, n

S ΐί Äbl ^ Tr ⁰ "'*" ° ^{beren ledlten part of the} casing 25 of the strips

lead ^g beam path em-sail device 18 attached, the other end of which,

The ', .κ hnrhrpfiol-.ipr ^ HM, ·. ^{UbCr dC} " ^{SUft 26 of plate 23} ^ ^rcift · ^{Allf of} ^ ⁰ "

^{Mch s} ? R ^£ " ^E Ässs, ü, 's;; ΐ

w _m H, m »λ - ~ λ η jl, ^win - ^ eunebei 30 connected to the

gg wall 6, so that it is srhvvpnlhnr; _dd

multiple back and forth reflection largely homoec- "W, 1 r? \ ,, ■ ο.

Sa share Ä £ ΐί £ 3Κ? Γν ^ 6 ind ^ nT ^ ^ "«. ^ Sheep, through, ™ «»

Directly through the diffuser 8 to the outside emerges Se 'provided ^h ''^ the ^{stiCe information} 8 ³²

the diffusion disk 8 penetrating in oSmS «ί i 7Γ r '" ° ^beS , the ^{platlc 23 wa}
Light that has been homogenized in a way that falls after the L ScSe T ** '"T" ■ «" l ^? · ^D f ^
Mirror 9 and wid di f di i "" ^tnsch »nwithin dasi.sc

Light that has been homogenized in this way falls on the L ScSe T ** '"T" ■ «" l ^? · ^D f ^ T

Mirror 9 and is shifted from this to the in itself clothed _U n ₀ , n "" ^tnsch »nwithin the Dasi.scher

As is known, by means of the slider 10, partially covering _a , visible ^ M ⁸ H ^{gen (aUS Flg} · ⁵ ' ^{Fcld VI} \ ^CP

bar strip mirror 11 is reflected. MiUeIs defected? ^ [ ? _e SrtT, Γ ^ - ^ ΐ ^da ? ^{TABLE A} " ^clothing "

about 10, which are more or less far in the rays, L, t ^C ° ^ prints wmi. around d.ese so on

pang of light can be ^{pushed 8} _odaß ϊ ™ ^? ^ ™ ** ™ ** * ""'"^ ¹¹ - T

they the area assigned to them by the reflection l _eP ih η ", ^g ' ^{St m der]} "' ^g " ⁵ f"

exclude, it is possible to partially cut the luminous flux 1, 0 Vhi hf η "T", ^{VI designated} section of the

Kudunkeln to make the desired partial and mu- ^ H α \ "^ ^{cut νΐ} " ^{νΐ Fi} E · ⁴ ^

fenless change in luminance on the specimen wordfn ", Tn ^ ^& ^ ^{dlC l} ' ^lattc ~ ^ ° ^% ' ^Γ " Γ

To achieve jection surface 12 ^{order is} ' ^{that the} shafts 20 c ^: ne eccentric

From the stripe mirrors 11 the one in its I _n - thin ¹ "^ 5 *" ? ^ohrun S ^{en 33 diescr P} ' ^a . "5 _f ²³

intensity partially changed luminous flux in the "S" ^ h ™ "· ^m , ^{Ilhm SC} '^{; lich} ""grcifcn.icn forces

leadership bcispi.! according to Fi e. 1 on the ceneintrn " A ^r ""c"" ^e ' ^asti5Cne lining 52 uruorhegen. .n

Cbenen ^ piegel I ₃ "reflected 'from which he bycKie Schäie 20" ^g * "? *« * " ^{IS1 Cs} " ^ichi " ¹ ^ *' ^

Condenser lens 72 in the lens 73 and of the 'As ^, ν ^X _K ^erSchl _u ^precisely -

Far to the non-illustrated projection falls SrStT ^{"beze 'chncte} Section field is unen

In the example of execution according to Fig. 2, the 40 tli \ Tu ^{Lmie V} " ^{V in F} * * ■ ^{4 again} ""

von den Streifenspieccln Il rVflektiene I i rom S ^ ^dle J ^c 5 ^ 20 zentnsch through the larger

"Uf an ellipsoidal mirror 14, from which it duS ^W-V Ä ^ ^r ° ^{dCr outer} - ^{fcststehenden} the diffusing screen 15. The subsequently arranged corrective η arranged retractable plate 35 engage,
turlinse 16, the negative stage 12 and the lens 73 ™ ° ^ ¹¹⁰ ^ ⁰¹ ? ¹³ ^ 35 (g s. F ι. 1) on the Fühningsbol- fixed on the unillustrated Proiektionsflärh ^ ^{ZCN J6,} which falls by means of a compression spring 37. ^J ^ aonsnachc 45 is supported on the fixed wall 21. The pressure in the illustration according to FIG. 3 is the spatial Li ³⁷ ^ ^{ird thereby du} rch the head 38 of the guide-mapping of the main components of the BL LEVEL j ^, S ^ehalte n and presses on this head 38 tung article in the front view, the way of the L ^uckhoI P ^{latte 3} S into the in F i g. 4 shown device Operate this after performing the % ^ u,

Section H-II (see Fig. 2), shown Man ν ^{dicser RückhoI} P ^{! Atte 35 isi} J ^{e a}

recognizes in the upper part the open, hemispherical ^{shape 0} ^ P " ¹¹¹ ? 39 and 40, by means of which one

Wall 6, where the front opening ab- p _f "f ^Ruckhol P ^la " e 35 take and in the direction of the

closing lens 8 has been omitted cjf, “. ^can move until you get the

The double cone 7 is centric within the Wan · *,.,. ^{Via their} circular disk-shaped heads 42

dung 6 arranged. Inside the venting pipe ^{s, n in the 'ncn'. the} starting position has returned.

17 is the lamp 2. The ellipsoid mirror 14 If the lower six shafts 20 in the ^{case of} P ^iehvseise

is the later to be explained in ^{detail'Strei- ! "n} " enm en, in which the slide 10 are all behind the

fenspiegeleinrichtung 18 opposite. "Enexionsplane of the stripe mirror 11 are. This

4 and 5 serve to explain input 6 ₀ η, _ησ ^Am | ^{at the setting of} the strip mirror device

zelheiten the structure of the Streifenspiegeleinrichtuns Srh "V ^'V ° -> ⁿ _ft ^{from the operator} n ^d e now single

18. According to the sectional view of ^Fig. 4, hay also grips connected groups

the slide 10 in the column IS between ^ the strip Ξ T ^ ^{0 more or} less far opposite-

the sectional view of Fi ε 4 grab hay enhang pp

the slide 10 in the column IS between ^ the stripes Ξ, T ^ ^{0 more or} less far opposite-

Window mirrors 11 a. the column 19 can be pressed into their order of κ ^{"Γ Richtun} g ^{of Pf} eües 41

Reflexionsfiäche region remote from expanded about 6, PZTL ?,, ^{best 'ned} strip mirror zones against a

: been ert, x to the insertion of the slider 10 to ER »7 ^{S Pro} J ^ektl ° nslichtes cover so that the

calibrated. . the negative located on ^{the N egaüvbühne 12 locally}

The shafts 20 of the slide 10 are illuminated in the two ηΓΓ ^ ΐ """ ^elli g ^ke 't.

υ- · - remaining wall 22 carries on its inside

a lining 43 made of a soft, elastic Material that the villains 20 in their released Position offers a certain displacement resistance, si) that this one assumed during the adjustment process Able to maintain if no additional external forces act on them and the plate 23 has released these shafts 20.

The section of FIG. 5 labeled VIII is a section along the line VII-VII of FIG. 4 again showing the location of the slide 10 within the column 19 between the strip mirrors 11 can be seen.

The section X finally tk-r F i g. 5 represents a Front view of the stripe mirror device 18.

While, as already described, the plate 23 in the FIG. 5, detail VL visible Position the shafts 20 clamped, so that they a certain axial pressure, which come about later will be explained, stand without changing its position, this plate 23 is then when the control lever 30 has been pivoted into the position shown in dash-dotted lines, with the assistance of the tension spring 24 shifted so far to the top right that ili; e bores 33 surround the shafts 20 centimeters, so that the shafts are now moved again for the purpose of adjusting the slide 10 by hand pressure can be (see section VI, Fig. 5).

In FIG. 6 is a particularly simple, easy to use and functionally reliable actuating device for the ski; 'vr 10 together with their shafts 20 reproduced. D.c Fig. 7 shows the perspective Individual representation of an element consisting of slide 10, shaft 20 and head 42.

The actuating device according to FIG. 6 consists; from a cylindrical, non-magnetizable! pipe 44. which has a cutout 45 into which one The end of the arched leaf spring 46 engages, the other end in an inclined incision in the tube 44 is anchored. The end of the leaf spring 46 engaging in the cutout 45 is cylindrical Bar magnet 47 connected, which is freely displaceable within the front portion of the tube 44 is. If you grasp the actuating device with your hand and press on the leaf spring with your thumb 46 in the direction of arrow 48, the leaf spring 46 is thereby pressed flat and displaces the bar magnet 47 in the direction of arrow 49, whereby its front end face 50 slightly from the frontal opening 51 emerges. You can now the actuator to any head 42 of the Hold the shaft 20 of a slide 10 and, since this head is made of iron, by means of the bar magnet 47 exert a pulling force on the same. The inner diameter of the tube 44 must not be greater than the diameter of a head 42 so that the head 42 cannot slide into the tube 44. Got one on this If a slide 10 is pulled into the desired position, the leaf spring 46 is released, whereupon the bar magnet 47 tears off the head 42 and wanders backwards. The slide 10 operated in this way remains in the position reached.

The actuating device according to the invention thus allows the shafts 20 of the slide 10 right move closely together, since you can grip each individual head 42 securely with this actuator can without the risk of accidentally pushing one of the adjacent heads 42 with it.

For the exact repetition of an optimal correction of a negative once achieved by means of the partial Streifenspicgel Il uiciu covered by slide 10 a storage disk, which is constructed similarly w ic the housing 25 with the shafts 20 mounted therein. Structure and mode of operation of this storage disk are explained with reference to FIGS. S to 1 1.

Thereafter, the two perforated plates 53 and 54 are firmly connected to one another within the box 52 mounted displaceably in the direction of arrows 55 and 56. Between them is a locking not shown arranged, which is similarly constructed and stored as the plate 23 of the strip mirror device 18. Number. The size and arrangement of the slide 57 are identical to that of the shafts 20 of the Stripe mirror device 18. These slides 57 can therefore, when the Arrctierplatte is released, move with little pressure. If, on the other hand, the actuating lever 58 is pivoted downward, then all slide 57 locked. By means of the lugs 59 (the one on the left connecting wall according to F1 g 60 attached attachment 59 is also present on the right, in this illustration not visible connecting wall of the two hole plates 53 and 54) can be the existing of the perforated plates 53 and 54 and the Arrctierplatte located therein storage plate Conveniently grasp and move 53 to 60. For example, if one wants that shown in FIG Position of the shafts 20 for later illumination of the slide 10 illuminated with this position To store negatives in a reproducible manner, the shafts 20 are initially set by pivoting the adjusting lever 30 (see FIG. 5) from the position shown in dash-dotted lines into the position shown in full lines and the resulting displacement of the plate 23 is fixed in its current position. After that, will the box 52 with the storage disk 53 to 60 so before the field of the shafts 20 brought that the heads 42 are precisely aligned with the slides 57 and each head 42 a slide 57 is assigned. This is done beforehand. d: eat all of the sliders 57 as far as this is predetermined by the construction, protrude forward. For this purpose, the storage disk 53 to 60 first pushed backwards until all slides 57 hit the rear wall of the box 52 and the stop occurs. All slide 57 are also not locked, that is easy to move. Thereafter, the storage plate 53 to 60 is pushed forward until the front one Perforated plate 53 rests against the Stirr. Strips 61 and 62. The slides 57 are now locked by pivoting the actuating lever 58 down. and their front faces now occupy a position. which is the exact image of the position of the end faces of heads 42 represents.

Do you want to go later, after the Shafts 20 have received a different setting for other enlargement work, the one saved in this way reproduce the shafts 20 by pulling out the return plate position again, so one brings first 35 all in the completely pulled-out position, corresponding to the position of that shown in FIG lower six shafts 20. which previously of course by setting the appropriate Plate 23 have been released.

Then the box 52 with its front Part pushed so far onto the housing 25 until its end strips 61 and 62 on the end wall 63 of the housing 25 lie. Then the memory

14th

plate 53 to 60 taken at the lugs 59 and in the outermost front position moved, inevitably the heads 42 of the shafts 20 by the slide 57 acted upon and brought into the desired position. The box 52 can now be removed will. The strip mirror device 18 is now in the precisely repeated setting to illuminate the negative used first. The color filter device 64 according to FIG. 12 consists from the carrier plate 73 on which the guides 66 and 67 are attached. In these rail-shaped trained guides 66 and 67 are the carriages

68 and 69 slidably mounted on wheels 74 and 75. The upper wheels 75 are in particular This is elastically printed in the upper guide 66 in order to ensure that the carriages 68 and 69 run completely free of play to secure. For this purpose, each of the carriages 68 and 69 has an attachment 76 on which it can be pivoted a wheel carrier 77 is mounted. An upper wheel 75 is mounted in each of these wheel carriers 77, and furthermore a spring 78 engages this wheel carrier 77, which presses the same upward, so that the upper wheels 75 always lie in the upper guide 66 under the action of this spring 78.

In each slide 68 and 69, which are otherwise completely identical, there is a filter 79 and 80, respectively attached. In the illustrated embodiment, the filters 79 and 80 are square in shape and are so attached in the angular cutouts of the carriage 68 and 69 that a corner after points in front and therefore the corresponding diagonals of the square filters 79 and 80 are aligned with one another. This arrangement is particularly important because it results in a linear adjustment of the carriages 68 and

69 as well as a coupled, likewise linear change in the degree of color mixing of the color filter device 64 is made possible. In Fig. 12 there are two successive positions of the filters 79 and 80 shown, the filters 79 and 80 in the starting position fully drawn out and drawn in dash-dotted lines in a supplied intermediate layer are. In the intermediate layer shown in dash-dotted lines, the filters 79 and 80 in FIG a square sub-area, and this overlapping sub-area grows continuously with progressive Infeed of the carriages 68 and 69. It can be seen from the illustration that the overlapping area the filter 79 and 80 is always exactly centered in front of the opening 5 through which the light falls into the hemispherical wall 6. Also in this respect a completely homogeneous light mixture within this hemispherical wall 6 is guaranteed.

The adjustment movement of the filters 79 and 80 is effected via the endless cable 81. This is wrapped around the drive roller 82 and with a Strand by means of the screw 83 on the carriage 68 as well as with the other, returned via the deflection roller 84 The strand is connected to the slide 69 by means of the screw 85. Because of the opposite direction of the strands, the pulleys 86 and 87 are arranged in pairs next to one another.

On the carrier plate 73 further drive rollers 82 'and 82 "are mounted, which are used to drive further, parallel in relation to the illustrated pair of slides 68 and 69, in front of or behind it Serve iegender feeder pairs. The drive roller 82 'virkt via an associated cable, which is here light has been shown, together with pulleys, which in the selected display behind the order Castors 86, 87 and 84 lying flat are to be thought of as "exactly how these act, while another one, the same." wiikciides drive system for a third filter aa from the drive roller 82 "and the deflection rollers fifi" ' 87 "and 84" consists.

The drawer-shaped one containing the negative stage 12 Part can be used for enlargers that are to be used for "several negative formats"

: o according to a further inventive idea in the form be designed that the distance between the outlet opening of the housing 88 of the Beleüch extension attachment and the negative stage 12 with a stable mechanical drive.

can be reduced. The side walls of this drawer-shaped Part would have to be replaced in this case by a bellows, not shown.

This would deliver a smaller negative in one and thus narrower part of the converging

The bundle of rays and, as a result, the entire luminous flux of the lighting attachment through the negative passes through, can also be influenced by the full number of sliders 10 in the illumination be able. This part therefore acts as a universal

Adapter for the different types of W ₁ enlargers.

List of drawing positions

3 "1 luminous flux

Light source

Cold light mirror

Condenser lens

opening
6 wall

Double cone

Diffuser

mirror
Slider

Π Strip mirror

Negative stage

inclined mirror

Ellipsoidal mirror

Diffuser
16 corrective lens

Mounting tube

Stripe mirror device

split
20 shafts

Wall

Wall

plate

Tension spring
25 housing

pen

Knee lever

Hinge pin

Hinge pin
30 levers

Bearing pin

elast. lining

Drilling

Drilling

35 return plate

Guide pin

Compression spring

head

39 Advantage

40 advance

41 arrow

42 heads

43 lining

44 pipe

45 detail

46 leaf spring

47 bar magnet

48 arrow

49 arrow

50 face

51 opening

52 box

53 perforated plate

54 perforated plate

55 arrow

56 arrow

57 slider

58 Operating lever

59 approach

60 connecting wall

61 front ledge

62 front ledge

63 front wall

64 color filter device

65 cables

66 tours

67 tours

68 sledges

69 sledges

70 filters

71 filters

TX condenser lens sc

73 support plate

74 wheels
7fi wheels
76 approach

23 02 I 13 16

List of drawing positions (continued)

77 Radträeer 83 screw 78 feather 84 Pulley 79 filter 85 screw 80 filter 86 Pulley 81 Cable 87 Pulley 82 Drive roller 88 casing

In addition 8 sheets of drawings

Claims (13)

23 113 claims: 1. Lighting attachment for photographic enlargers with a light source in which Beam path an optical system with reflectors is arranged in one of the focal points the virtual image of the light source and the lens in its other focal point is located, with one in several in their reflection portion in the beam path of the optical system changeable strip mirror subdivided mirror is located, using a Source of diffuse light, consisting of an inside whitened through a diffuser on the output side closed hemisphere, which has a conical, reflective body inside, characterized in that the conical body consists of a highly reflective Double cone (7) consists, the walls of which are inwardly curved and in a slender point ao run out that in front of the inlet opening of the hemisphere a color filter device (64), consisting made of mounted on carriages (68, 69) that can be displaced in pairs from both sides into the beam path dichroic filters (79, 80), arranged a <and that the diffuse luminous flux (1) the strip mirror (11) falls without the light-remote reflection path of the negative stage beforehand (15) directly illuminating mirror (13 or 14) to cross. 2. Lighting attachment according to claim!, Characterized in that the luminous flux (1), the the diffuse light source leaves, through a mirror (9) arranged inclined in front of the partially coverable strip mirror (11) reflected and from this in turn on a curved Mirror (14) is thrown, from which he passes through the negative stage (12) and the lens onto the Projection surface falls. 3. Lighting attachment according to one of the claims 1 or 2, characterized in that the shafts (20) of the strip mirror (11) in two fixed, parallel walls (21, 22) are guided, between which one parallel to these Walls (21, 22) displaceable plate (23) is arranged resiliently supported. whose through through bores (33) an elastic / 'skleidum: (32) and the knee joint:> el gear (27 to 31) optionally in two operating positions is displaceable that in det an operating position, the adjustment of the shafts (20) unhindered can be done while this villain (20) in the other Beiricbsstclliing by the; elastic one-sided pressure of the elastic lining (32) are fixed. 4. Lighting attachment after a de; Claims 1 to 3, characterized. Yes on! ' de: Operating side eier outer, the shafts (2ü bearing wall (22) a return plate (35) which can be moved freely in the shafts (20) and which engages over official shafts (20 ') with its bohiunge " ¹ 4" , where; .icr diameter of these bores (34) is the size, aider diameter of the shafts (20). 5. Discussion essay after one of the · ι- ^ j Spriiehe 1 to 4. characterized in that ι ■ · Inside of the outer, the shafts (20 'aeerndc plate (22) with an all shafts (2, n narrow surrounding elastic lining (43) vlUUZVt ΙΟΙ. 6. Lighting attachment according to one of claims 1 to 5, characterized in that the The heads (42) of the shafts (20) of the slide (10) are made of iron. 7. Lighting attachment according to claim 6, characterized in that the heads (42) through a bar magnet (47) mounted displaceably in a tube (44) which is open at the end can be actuated are, by a pretensioned, outwardly arched and externally accessible leaf spring (46) is held in the retracted position. 8. Lighting attachment according to one of claims 1 to 6, characterized in that a U-shaped box (52) is placed on the strip mirror device (18) from the outside, the leg edges of which are aligned with the side edges of the strip mirror device and angled forward within it Walls, a storage plate (53 to 62) is held floating in a central position by springs, this storage plate (53 to 62) in its perforated plates (53, 54) containing bearing bolts that are aligned with one another, the position of which corresponds to the exact image of those bores, in which the shafts (20) of the slider (10) are mounted, furthermore slides (57) are mounted freely displaceable and locked in these bearing bores, the dimensions of which correspond to the shafts (20) of the slider (10) and which are provided with a between the walls of the storage disk (53 to 62) arranged locking plate iv.:- are optionally clamped or released according to claim 4. 9. Lighting attachment according to one of the claims! to 8. characterized by an between the light flux generating lamp (2) and the source of diffuse light arranged color filter device (64), consisting of paired, poured, relat'v mutually movable filters (79, 80). with those facing each other to overlap reaching edges of the filters (79, 80) of a pair do not run parallel to one another. 1Π. Beleuchturiiisaiifsaiz according to claim 9, ...> .- characterized by that the chutes (68, 69) of a cooperating filter pair (79. 80) ¹ Jr UU are ien endless cable (81) driven. 11. Π. \ Uchtungsaufsatz according to one of the claims '■ or 10. characterized in that three pair dichioitisehe filters (79, 80) in the three subtractive ^ primary colors are provided, the in pairs in the same basic color bi are brought to a complete overlap Be able. P. lighting attachment according to one of claims 1 to 1 1, daili'rch <: c! '. Enn; ⁷ c; ch; iet. that dk- \ 'c _? : at] \ stage (12) with the housing (88) of the lighting attachment /: -. connected via a beacon. 13. HeU'uchHmgSiiufsatz na-. Ί Claim! .., da, .-. i; .. n ^ / denotes that Ji r distance. ■ wipe Negative stage (12) and housing; 88) dijü'h elücn Mabiien mechanical drive adjustable it is.