301.38 Trinocular Head : Trinocular head fitted with multilayer antireflection coated prisms, inclined 45°, rotatable through 360°. Light path in trinocular head directs either 100% light for observation or 80% for microphotography and 20% for observation.

Student Polarising Microscopes

301.39 Topgem Student Polarising Microscope Model TG-365 : It is designed for extensive routine work as well as scientific examination in research and industries, owing to its wide possibilities of application. It serves other branches such as biology and medicine.
Specifications :
Stand : Monocular inclinable body having coarse and fine motion with rack and pinion.
Stage : Provided with circular graduated upper plate having rotary and centring adjustment.
Polarising Unit : Polariser-rotating type and graduated to 360° Scale graduated in 5°.
Analising Unit : Sliding type.
Compensator : ¼ wave and Gypsum Plates.
Condenser : With centring and vertical adjustment of 1.4 N.A. complete with blue filter and iris diaphragm.
Bertrand Lens : For conoscopic observation with focussing facilities.
System : Microscope is supplied with two systems i.e. centring of objective/centring of stage.
Packing : Supplied in wooden box having lock and key.
Optical Combination :

Metallurgical Microscopes

301.40 Topgem Student Metallurgical Microscope Model TG-368 :
Application : Serves for subjective as well as objective observation in Transmitted, Natural or Polarised Light. It is employed for the observation of the axial interference images of the minerals. It serves especially in Geology, Geochemistry, Mineralogy, Petrography, Metalography, Glass Industry and other branches of science such as Biology, Medicine, Ceramics etc.
Specification :
Stand : Monocular inclinable body having coarse and fine motion with rack and pinion.
Stage : Provided with circular graduated upper plate having rotary and cenring adjustment.
Polarising Unit : Polariser, rotating type and graduated to 360° scale, graduation in 5°
Analysing Unit : Sliding Type.
Compensator : ¼ and ½ Wave Plates.
Condenser : With centring and vertical adjustment of 1.4 N.A. Complete with Blue Filter.
Bertrand Lens : For conoscopic observation, sliding type.
System : Microscope is supplied with two system i.e. Centring of Objective or Centring of stage.
Vertical Illuminator : Serves on observation of natural as well as Polarised incident Light. Provided with independent source of illumination with step down transformer.
Packing : Supplied in wooden box having lock and key.

301.41 Topgem Microscope Model TG-370 : The microscope is most suitable for group discussion as well as for teaching.
Screen : Grainless Optical true 150 mm outer circular dome, 360° rotatable for mounting on microscope.
Condenser : A high quality glass condenser in front of screen.
Mechanical Tube : Length 160 mm
Optics :
Eyepieces : X10 Huygenian
Objectives Achromatic : X10 and X40 spring loaded
Nose piece : Triple revolving nose piece.
Movement : Coarse motion through rack and pinion with precise and accurate fine movement. Fixed square stage 102 x 102 mm.
Transformer : Workable by 12 V 21 Watts, built in base.
Lamp Assembly :
Fixed lamp, built in base of high illumination with high power condenser and screen it will work as microview projector.
With lamp, transformer, but without it will work as microscope.
The viewing of biological microscope slides is distinct and enlarged. Sharp, clear and evenly illuminated image in full colours, visible to the whole class free of distortion. Supplied in polished wooden box having lock and key.

301.42 Spare for above (301.40) :
a) Lamp 12 Volts 21 Watts
b) Graduated Mechanical Stage.

Stereomicroscopes

301.43 Topgem Student Stereomicroscope Model TG-380 : Simple to use binocular stereomicroscope with a large working distance and field of view. The microscope is focused by a rack and pinion. The prism boxes are rotatable to suit the user interocular distance. The whole microscope is carried on a robust stand is fitted on the base 175 x 200 mm with stage clip and reversible black / white disc.
Magnification : X20 or X40
Eye pieces : Paired X10 largefield
Objectives : Paired X2 or X4
Working Distance : 55 mm minimum
Interpupillary distance : 50 to 75 mm
Dimensions overall : 245 x 120 x 175 mm height x width x depth
Supplied in wooden box having lock and key.

301.44 Topgem Student Stereomicroscope Model TG-390 : Simple to use binocular stereomicroscope with a large working distance and field of view. There are two parafocal pairs of objectives mounted on a rotatable turret.
The prism boxes are rotatable to suit the user interocular distance. The whole microscope is carried on a robust stand is fitted on the base 175 x 120 mm with stage clip and a circular plate which is white on one side an black on the reverse. The microscope is supplied complete with dust cover in a lockable wooden case.
Magnification : X20 or X40
Eye pieces : Paired X10 largefield
Objectives : Paired X2 or X4
Working Distance : 55 mm minimum
Interpupillary distance : 50 to 73 mm
Dimensions overall : 245 x 120 x 175 mm height x width x depth.

301.45 Topgem Stereomicroscope Model TG-400 : A compact, robust stereo microscope producing upright stereoscopic images. The instrument is adjustable for interocular distances and the left eye piece tube has an independent compensating adjustment. There are two parafocal pairs of objectives mounted on a rotatable turrent. The microscope is focussed by rack and pinion and the whole head can be raised on the pillar and locked in position to accomodate large objects on the stage. The base is fitted with two stage clips and a circular plate which is white on one side and black on the reverse. The microscope is supplied complete with dust cover in a lockable wooden box.
Specification :
Eye pieces, paired : X10 Lare Field
Objectives, paired : X2 and X4
Free working distance : 58 mm
Interpupillar distance : 40 to 75 mm
Dimensions overall : 165 x 105 x 270 mm. Length x Width x Mas. Height
Stage Plate : 60 mm diameter.

301.46 Topgem Binocular Stereo Microscope Model TG-410 : A robust, low power microscope, with integral illumination. The binocular head has a twin converging lens and prism system, giving upright deep focus images, large field eye pieces. Objectives are mounted in the barrel nose piece which is rotatable to give the required magnification. The interocular distance can be adjusted and independent adjustment is provided for the left eye piece. Focusing is by rack and pinion with stops at the upper and lower limits of travel. The stand is cast alloy with a hard apoxy finish, for ease of cleaning has two integral illuminators 21 W transmitted ligth source below the plate in the base. A selector switch allows either or both light source to be as required. Packed in wooden box and lock and key.
Specification :
Eye pieces, paired : X10 Lare Field
Objectives : X2 and X4
Free working distance : 58 mm
Interpupillar distance : 40 to 75 mm
Dimensions overall : 300 x 160 x 210 mm. Height x Width x Depth

301.47 Dissecting Microscope : A versatile instrument for fine dissection work etc. The high eye point lens (either X10 or X20) is mounted on a jointing arm allowing the whole stage area to be scanned. The wide glass stage has two spring clips and a reversible sub stage mirror/opal face illuminator. Focussing is by a rack and pinion mechanism and detachable rests on either side of the stage provide a steadying support for hands during fine dissection. All metal construction. Supplied complete with X10 and X20 lenses in a wooden cabinet.
Dimensions overall : Height 180 mm., Stage 65 x 85 mm.

301.48 Cornex Dissecting Microscope : A robust traditional microscope constructed from a solid block of wood. The sides are out away at a concenient angle to form hand rests. A glass stage is provided, illuminated from underneath by a mirror set at 45°. The lenses are carried on an arm which can be swung across the stage plate so that objects at different positions can be examined. The two lenses supplied enable magnification of X10 and X20 to be obtained.
Dimensions overall : 240 x 95 x 70 (length x width x height)
Stage : 80 x 50 mm (length x width)

ALSO AVAILABLE :

Travelling Microscope :   A heavy cast iron base fitted with levelling screws top machined over which slides a metal carriage which can be clam ed at desired position. The stage carries a vernier that travels over a stainless steel scale graduated in mm 0 to 16.5cms. A Gunmetal pillar fixed to the stage has an embedded S.S. Scale graduated 0 to l5cms and carries a vertical travelling carriage with vernier. Horizontal stage for placing objects is fitted with milky plate. The microscopic tube on vertical travelling carriage is focussed by rack and pinion and has an achromatic objective, a ramsden eye piece lOx and a cross line graticule. Vernier read- in .01 mm supplied in wooden case.