DE7701822U1 - DEVICE FOR HOLDING AND FOCUSING LARGE LARGE LENGTH PROJECTION LENSES - Google Patents

Description

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Device for holding and focusing large length projection lenses

The innovation relates to a device for holding and focusing projection lenses with a large overall length Because of the relatively high weight of such lenses buses the receiving and guiding parts with particular precision be manufactured in order to achieve a loan-compatible, backlash-free adjustment. As a further requirement for A good guide quality is required, oh, the guide length of the lens to be dimensioned as large as possible, so that the tensile and pressure forces do not slow down Make shifting noticeable

However, these demands stand in the lack of sufficient Opposite space, as the stage and lighting optics can be accommodated directly in front of the lens is. With the devices known up to now, one was therefore forced to To make a compromise and waive long guide sleeves or the like, the precision to increase and / or to provide additional aids for stabilization «

The task of the present innovation is to avoid it the storage of relatively expensive cylinder guides and to improve the bracket and to enable a loan-compatible adjustment when focusing. this will achieved by the fact that the lens can be detached in e em

B 2923

Pat Jg / Ma-19.1.77

r Patent Department - 2 -

adjustable carrier short overall length is used, the at least two cooperating with bearing points on the base frame Has guide elements, one of which is designed in the form of a rod which extends over the dimensions of the carrier protrudes by a multiple of the same opposite the lens side and its one bearing point is arranged at the cantilevered end. In order to achieve a good weight transfer, the bar is also used ao dimension that aie auoh to about the lens side the carrier protrudes, wherein the second bearing point of the rod is arranged at the end that protrudes on the lens side is*

In addition, it is suitable for the purpose of adjusting the lens For focusing, the rod is coupled with drivable control means «For this purpose, there is a Fastened fork, between which a Duroh motor drive adjustable Gleichdiok is stored without play.

The second guide element can also be in the form of a Pole, but with a short overall length, be designed To achieve the target, it is only necessary to that one of the two rods protrudes far to "absorb the forces acting on the rod end ** · The other rod is therefore only formed approximately in the width of the carrier

A particularly advantageous bracket results when the two guide elements on the side of the carrier, preferably in a plane parallel to the storage area of the device to be ordered. Of course it is also possible one of the two guide elements above and that others below the lens, preferably in one

Mount the level perpendicular to the device's surface,

7701822 07.er.77

^{; :} B 2923 Pat Jg / Ma-19.1 .77

Patent department "3". ί ^!

with the longer rod below the projection lens lies and acts as a load-bearing member, while the shorter one is essentially only used for side orientation.

Further details can be found in the description of an in the exemplary embodiment shown in the drawing ersiohtlioh. Show Ee

Pig. 1 the bracket and focusing device for a long focal length lens in plan view, partially cut,

Pig 2 a cross section along line A-A of Pig 1, Pig. 3 shows a cross section along line B-B of Pig. 1.

The lens 1 is detachably inserted into the front plate 2 of a carrier 3 which is fastened to the side rod 5 by means of clamping screws k. On the carrier there is another rod 6 on the opposite side of the rod. Both serve together as guide elements. The end of the rod 5 protruding on the lens side receives the bearing point 7. It consists of the two rollers 8a, ¹ 8b and the opening noses 9a, 9b arranged transversely thereto. The roller 8a supports itself with the axis protruding on both sides on the base frame 10 and serves as a load-bearing member, while the roller 8b only takes on a safety function.

Its similar bearing point is opposite to the sioh Direction Arranged over a multiple of the beam width protruding end of the rod 5. she is denoted by 12. The balance of power is here however different because of the different lever lengths. The role 13a trims sioh in the same way like the role 8a on the base frame 10. The role 8b

7701822 07.07.77

■ Patent Department

- <■ ^: ' B 2923 .77 P. .1 · " Pat Jg / Ma-19.1 ö - k - ^ m - f ^ m

or 13b is taken from a resilient bracket 1 ^ on, which has the task of guaranteeing an easy run.

The bearing 15 is assigned to the shorter rod 6. The base frame 10 is equipped with adjusting means not shown equipped, which allow an alignment of the optical Aohse 17 of the lens with a lighting device and object holder equipped device housing.

A fork 18 is located on the rod 5 at the level of the bearing 12 mounted, between whose arms a Gleiohdiok 19 engages. The latter is rotatable about the Aohse 20 connected to a motor M.

7701822 07.07.77

Claims (8)

Sohutzanaprüohe 1. Device for holding and focusing projection lenses large overall length, marked dadurah, that the lens (i) can be detachably used in an adjustable carrier (3) with a short design, of at least two with bearing points (7, 12) on the bottom frame (10) cooperating guiding account (5 »6) has, one of which is designed in the form of a rod (5), which over the dimensions of the carrier by a multiple of the same opposite to Lens side protrudes and one bearing point (12) of which is arranged on the protruding end. 2. Device according to claim 1, characterized in that that the rod (5) protrudes beyond the carrier (3) also after the lens side and that the second bearing point (7) of the rod is arranged at its end protruding towards the lens. 3 device according to claims 1 and 2, characterized in that that for the purpose of adjusting the lens ■> "" ■■ for focusing the rod with drivable control means (18, 19) is coupled. 4 * device naoh claim 3 «characterized that a (saber (18) is attached to the rod, between the one adjustable by a motor drive Gleichdiok (19) is mounted free of play " 5. Device naoh claims 1 to k, characterized in that a rod, but short overall length, is also used as the second guide element, 7701822 07.97.77 .B 2912 Pat Jg / Ma-19.1.77 Patent department 6, device naoh the claims 1 to 5 »daduroh characterized in that the bearing points from sliding rollers
exist. 7 «Device according to claims 1 to 6, characterized in that the two guide elements are located on the side of the carrier, preferably in a plane parallel to the
Are arranged floor space of the device. 8. Device according to claims 1 to 6, because · ■■ ·> * indicates that one of the two guide elements above and the other below the lens preferably is arranged perpendicular to the footprint of the device, with the longer guide element below of the projection lens and acts as a supporting member, while the short guide element in the essential only for page orientation, : 9 · Device r ^ ach the claims 1 to 8, daduroh ge indicates that the guide elements with means
for lateral and height adjustment of the carrier are combined.