Curriculum Vitae: Lothar Kölsch

• Degree in geodesy from the University of Applied Sciences of Frankfurt in 1978
  
• From 1979 lens designer at Carl Zeiss Oberkochen; focus on fundamentals of zoom lenses and development of photographic lenses
  
• From 1986 head of the lens design department for consumer optics at Wild Leitz Wetzlar; development of photographic lenses, mainly zoom lenses, and binoculars
  
• In 1990 change to Leica Camera; set up of lens design department;
  training of lens designers; setup of aspheric metrology
  
• From 1992 in addition head of mechanical design of photographic lenses; development of many products (lenses, binoculars, eye-pieces, illumination systems); project management; technical assistance to the shop; strategic planning of product programs for photography and binoculars
  
• From 1997 in addition head of camera development
  
• From 1999 to 2002 vice-president R&D; responsible for the departments:
  - optical design, mechanical design of photographic lenses
  - electronics and electronic imaging
  - sport optics, binoculars and spotting scopes
  - camera development
  
  "I am married and father of two children; I like smoking pipe, drinking tea and jogging."
  

A su nombre hay tres patentes en el registro internacional

Patent Number Title Of Patent Date Issued

• 6439256 Switchable flap valve August 27, 2002
  
• 5388006 Telephoto camera lens February 7, 1994
  
  • The telephoto lens is in each case put together from two different lens systems, a front group and a focusing group.
    
  
  
  
• 5321555 Compact photographic objective of the triplet type having improved chromatic and monochromatic characteristics June 14, 1994
  
  • An objective for use in photographic compact cameras has a relative aperture of 3.5 and a focal length of 35 mm, and is of the triplet type. The lens element on the object side is a cemented element.
    

Las tres patentes datan de su época en Leica, el sistema de objetivos telefoto en dos partes es el APO-Telyt-R Module; el objetivo basado en el triplete es el destinado a las compactas, aunque algo me dice que está relacionado con el 40 mm f:2,4 de la Minilux