Newtonian Collimators 

Lambda/Ten Optics Newtonian collimators are Herschelian mounted Newtonian telescopes. This classic all-reflective configuration has no central obstruction and locates the focal plane to the side of the telescope structure. The parabolic primary segment collimates light reflected by a flat turning mirror from a light source or transilluminated target. Alternately the system can be used as a "receiver" imaging light from a distance to a detector in the focal plane. 

• Schlieren systems 
• MTF target projectors 
• Propagation transmission studies 
• Interferometric collimators 
• MRT measurements 
• Remote sensing receivers 
• Radiometric systems 

These systems are packaged in self-supporting, ruggedized enclosures designed to provide thermal stability. Each mirror is removable for cleaning. Mirrors are made from low expansion Schott Optical Glass Company Zerodur. Coatings are hard and cleanable. A mounting plate with bolt circle concentric to the optical axis is provided just ahead of the focal plane. A centering target is aligned to the mounting plate. This target diameter subtends 1 milliradian at the primary mirror and may be inserted into the aperture in the mounting plate to locate the focal plane and optical axis of the telescope. Target wheels, light sources, filters or detectors may be located and aligned relative to the centering target. These high quality, prealigned telescopes are readily adapted to user systems. 

• Wavefront Accuracy: 1/5 wave peak to valley at 6328A over 100% of clear aperture (certified by computer reduced phase shifted interferogram.) 
• Wavefront Slope Error: 5 microradians maximum 
• Focal Length Tolerance: +/- 1/2 percent 
• Standard Optical Coating: Coatings meet MIL-M-13508C for hardness, adherence, temperature and humidity. (Protected aluminum or silver) (Other coatings on request) 
• Certification: Spectral reflectivity curves included with each system. Two interferograms to certify wavefront. 
• Mirror Surface Quality: 60-40 Primary, 40-20 Turn flat 
• Target Size: 1 inch (25.4 mm) diameter in focal plane

Collimator Models 

Model Designation	Focal Length	Beam Diameter
NC 30-6	30 in.	6 in.
	762 mm	152 mm
NC 40-8	40 in.	8 in.
	1016 mm	203 mm
NC 60-8	60 in.	8 in.
	1524 mm	203 mm
NC 60-10	60 in.	10 in.
	1524 mm	254 mm
NC-60-12	60 in.	12 in.
	1524 mm	305 mm

• Increased wavefront accuracy 
• Custom focal lengths 
• Larger apertures 
• System integration 
• Custom coatings 
• Target wheels with custom apertures 

Lambda/Ten Optics