The control unit consists of the permanently installed mount (1) in the fuselage 
and the control instrument (2). 
The camera system (from bottom to top) consists of the mourt (3) with the 
permanently fixed drive unit (h) on top of it, tre inserted lens cone (5) as central 
unit and, finally, the cassette (67. 
2. FUNCTIONAL UNITS 
The lens cones constituting the imaging system proper (camera) have in their design 
been as far as possible reduced to this function. They contain in addition to the lens 
and the image plane merely the marginal imaging facilities, the sensor of the exposure 
measuring device and the shutter. Thus a considerable reduction in weight could be achieved 
compared with its predcessor. 
The P1 5.6/90 Superlamegon, 4.5/150 B Lamegon and P1 5.6/300 Lamegon lenses 
whose high performance had already been proved in the previous instrument (1) (2) (3) 
have been integrated in the LMK without any modification in their optical design. 
The newly developed shutter is uniform for all lens types; it is removable without 
the need of disassembling the lens cone. The focal-plane frame (image plane) has now 
a larger usable format of 228 mm x 228 mm and incorporates 8 fiducial marks which form 
a regular grid with a mesh width of 110 mm. The marginal images essentially correspond 
to those in the MRB camera: the possibility is provided of imaging further, even 
externally produced, data. 
The handling of the filters, which are now strongly reduced in weight, was 
considerably facilitated. They can be conveniently be inserted from one side when 
the camera is swung out. 
The narrow-angle (1.259) sensor system for measuring the terrain brightness is 
accommodated besides the lens and covers the object details in the flight route. By 
forcing the same filter to be placed in position the measurement value is 
automatically corrected to the actual conditions. 
The camera mount was reduced in its dimensions and its vibration isolation improved 
by reducing the natural frequency and by a symmetrical design of the spiral spring 
bearing. The tilt motion for levelling is performed by a universal joint whose fulcrum 
point. approximately coincides with the projection centre of the camera lenses. 
Therefore, the required-diameters of the holes in the fuselage are reduced to a minimums 
Regarding the arrangement of the film trarsport and the film-pressure plate 
mechanism the cassette nearly corresponds to the proven MRB design; in its detail 
conception it was, however, modified by the incorporation of a device for the 
compensation cf the linear image motion. 
The shift of the projected terrain image relative to the stationary emulsion in-—— 
conventional systems caused in the exposure period in the image plane by the forwerd 
motion of the aircraft has so far produced partially a considerable degradation of the 
image quality and rendered the use of high-resolution emulsions impossible because of - 
their low sensitivity. in the LMK system the disturbing image motion is compensated in 
that the pressure plate together with the vacuum-clamped film is shifted at the same speed 
and in the same direction. The calculation of the compensation speed is performed by the 
microprocessor using the v /h, ration which is ascertained on the control unit. The 
maximally compensatable imdge?speed is 64 mm/s. The exposure of the fiducial marks is 
made witht an extremely short exposure time at the mid-point of photo exposure. On the 
one hand, this ensures the sherp imagery of the fiducial marks and, on the other 
the conditions of the interior orientztion for the total image content are strictly 
satisfied. : 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
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