Reflective Telescopes & Collimators
Reflective optical systems help remote sensing, illumination, seeker (detector) characterization and spectral test applications. We offer apertures from half-inch to 12 inches and versions for the vacuum UV and LWIR -- these are all spectrally agile.
Telescope 50mm c.a. Newtonian
Reflective unobstructed Telescope uses a large angle off axis parabolic to produce a collimated beam. Used to collect light from a distance and focus same to spectrometer slit or fiber optic. All reflective design uses asphere to prevent light loss. Clear aperture is typically between 1 to 3 inches at ~f/2. This compact design can adjusted under vacuum conditions and works equally as well in fiber coupled UV/Vis applications.
These telescopes are usually customer arranged to spatially plot an event, or monitor distinct events. Telescopes are equipped with high quality parabolic optics for optimal light gathering and signal delivery.
Telescope 125mm c.a. Cassegrain
Cassegrain telescope with 5" clear aperture uses a spherical primary mirror and a plane secondary. The internal focus point is suited to work with small (eg. 100 um) fiber optics and subsequent coupling to a spectrometer. The primary has effective focal length 125 mm. Field of view depends on the fiber (diameter) selected to send or collect the light. Doped and UV capable fibers are available. The spectrometer includes a reflective fiber-coupling accessory to match fast fibers to spectrometer optics more effectively.
Telescope 300mm c.a. Cassegrain
This Cassegrain uses a 12" clear aperture parabolic primary mirror and hyperbolic secondary. It was designed to have a large image plane and has a very flat >35mm diagonal field easily accessible behind the primary. With the absence of glass correctors or optical contact lenses, this optical design eliminates chromatic aberrations and reduces coma and off-axis aberrations. It works with ultraviolet, visible or infrared optimized reflective coatings and provides very wide wavelength range operation. Can be fiber- or directly coupled to one of our imaging spectrometers.
Have a vacuum application? This a Dall-Kirkham Cassegrain design has a 210 mm diameter concave elliptical primary mirror and convex spherical secondary. Light exits behind the primary via a central hole. The entire optical assembly works in 10E-6 mbar and mounts via ISO LF320SB flange and certified leak tight from the mounting flange to the NW40KF access port.
Collimator 20mm c.a. Newtonian
Reflective unobstructed Newtonian collimator with 0.8 inch clear aperture uses a precision off-axis parabolic mirror and folding flat. This is one of our highest performance collimators and f/5 to collect and deliver lot of light. The beam size is just right for downstream work with conventional 1 inch optics. This collimator is frequently used in our UV to LWIR Spectral Test and Calibration Stations.
Collimator 100mm c.a. Newtonian
Reflective unobstructed Collimator uses a pair of spherical optics with normal incidence reflections to produce a collimated beam. Clear aperture is typically between 4 to 8 inches at ~f/5. It is available with built in pick-off optic for a correction / monitoring detector system. This optical design is more easily adapted to work with larger monochromator slits or otherwise when cost of off axis parabolic mirrors cannot be justified. These systems move a lot of light and work well in our UV to LWIR Spectral Test and Calibration Stations..
This Newtonian collimator with 4 inch clear aperture uses a precision off-axis parabolic mirror and folding flat. It is most useful when the better collimation is required and monochromator slits can be kept small.
Need high performance in the vacuum ultraviolet, similar designs are available in high vacuum 10E-6 mbar packages. Pictured here is a 2 inch c.a. Newtonian collimator using a fold flat and precision off axis parabolic mirror for great beam collimation. Terminal flange is ISO NW100KF
Collimator 25mm c.a. VUV
Reflective unobstructed Collimator for 1 inch c.a. output beam uses a pair of spherical optics with normal incidence reflections to produce a collimated beam. This optical design is more easily adapted to work with larger monochromator slits or otherwise when cost of off axis parabolic mirrors cannot be justified. These systems move a lot of light and work well with our Model 234/302 monochromator. This version also available all-metal sealed for Ultra High Vacuum applications.
Collimator 15mm c.a. VUV
This compact, vacuum compatible design is fast and provides beam shaping. Reflective cylindrical optics are selected to better collect light and handle the significant aspect ratio at monochromator slits. This system does not produce a real collimated beam but will manage to deliver about the collected light to a 15mm spot over a meter away. The version pictured uses ISO NW40KF flanges for mounting and beam path. It works best with the Model 632 Deuterium lamp and the 200mm Model 234/302 vacuum monochromator. These collimators are frequently used in our VUVAS vacuum ultraviolet spectrophotometer VUVaS