QM 1 Long Mount

Long-Distance Microscope


Specification Sheet

The QM 1, for which Questar Corporation received an IR-100 award in 1983, was the first of a new series of long-distance microscopes. It has a working range of 22 to 60 inches, a 30 to 1 variability in field of view, and remarkable depth of field, linearity and chromatic correction which make it an indispensable tool for a wide variety of laboratory and industrial applications. The QM 1 Long Mount includes two selectable ports, a semi-rugged tube design with integrated full length mount for system stability and is compatible with standard eyepieces, 35 mm, and video formats.

Type:Maksutov Cassegrain Catadioptric
Working Range:560 mm (22 inches) to 1520 mm (66 inches), subject plane to front element.
Clear Aperture: 89 mm (3.5 inches).
Entrance Pupil: Primary Mirror 96 mm (3.8 inches).
Relative Aperture/Numerical Aperture:Working DistanceNum.Aper.F/num.
1400 mm (55 inches).028816.8
1020 mm (40 inches).038512.9
700 mm (27.5 inches) .051110
560 mm (22 inches).05808.7
Resolution:Better than 3 microns at 22 inches
Magnification:To 125 times visual, to 12 times at image plane.
Format:Diffraction limited field 12 mm, 18 mm nearly diffraction limited.
Back Focal Distance:70 mm (2.75 inches) minimum measured from back plate.
OpticsCorrector: BK7, Magnesium Fluoride Coated, 89 mm (3.5 inch) diameter.
Primary Mirror: Pyrex, Aluminum Coated, SiO overcoated, 96 mm (3.8 inch) diameter.
Secondary Mirror: Aluminum Coated, R1 surface of corrector, 22 mm (.87 inch) diameter.
Baffling: Helix in central tube, all interior surfaces black anti-reflection coated.
MechanicalBarrel: Aluminum Hollow Bar, machined full length, with integrated lens cell and mount, black anodized exterior finish.
Length (with control box) 30.5 cm (12 inches); Outside diameter 10.8 cm (4.25) inches. Weight 3.7 pounds.
Rear Closure Plate:With stainless steel central tube - precision machining and alignment after assembly.
Focusing Mechanism:Mirror thimble integral with stainless steel sliding tube. Slides on fixed, stainless steel light baffle tube (centerless ground).
Control Box:Cast Aluminum, selectible axial or 90o port. Internally mounted 1.5X Barlow selectable for 90o port, flick knob controlled.
Knobs:Aluminum 24S-T4, corrosion-resistant, hand-turned on turret lathe, stainless steel shafts and levers.
*Specifications subject to change without notice.

Questar Corporation Phone 215-862-5277 or 800-247-9607

6204 Ingham Road Fax 215-862-0512

New Hope, PA 18938 Email Questar@QuestarCorporation.com

USA Web www.QuestarCorporation.com