OPTICAL BENCHES ARE VERY VERSATILE INSTRUMENTS WITH WIDE APPLICATIONS IN RESEARCH AND EDUCATIONAL LABORATORIES , INDUSTRY & INSPECTION DEPARTMENTS. SOME IMPORTANT APPLICATIONS ARE :
* CHECKING VARIOUS PARAMETERS LIKE FOCAL LENGTH , ABBERATIONS etc. OF LENSES , MIRRORS AND OPTICAL SYSTEMS.
* FOR TEACHING, DEMONSTRATION AND INSTRUCTION OF VARIOUS OPTICAL PRINCIPLES.
* FOR SETTING UP VARIOUS EXPERIMENTS OF LIGHT LEVEL MEASUREMENT & COMPARISON , INTERFERENCE ( BY FRESNELS BIPRISM AND VARIOUS OTHER METHODS) AND DIFFRACTION.
* IT IS USED FOR ALIGNMENT AND POSITIONING BY MEANS OF LINEAR / ROTATIONAL MOVEMENT OF VARIOUS COMPONENTS , TELESCOPES, COLLOMATORS , LIGHT SOURCE Etc. IN MANY LABORATORY EXPERIMENTS .

IT CONSISTS OF 170/200 CM LONG LATHE BED TYPE BENCH MADE OF AGED RUGGED , WELL RIBBED & STRAIN RELIEVED SPECIAL GRASE CLOSE GRAIN IRON CASTING. THE VEE AND FLAT WAYS ARE PRECISION GROUND FOR STRAIGHTNESS.FOUR LEVELLING SCREWS WITH FOOTPLATES ARE PROVIDED .THE SCALE FOR DETERMINING THE POSITION.THE SCALE FOR DETERMINING THE POSITION OF THE CARRIAGES IS GRADUATED EVERY 1 MMON A PRECISION DIVIDING MACHINE.THE BENCH IS RECOMMENDED FOR PRECISION MEASUREMENTS.

CARRIAGE : EACH CARRIAGE IS PRECISION MACHINED AND ASSEMBLED FOR SMOOTH SLIDING MOTION AND FREEDOM FROM TILT.THE REAMED HOLE DIA 12.7 MM OF THE VERTICAL PILLAR IS PERPENDICULAR TO THE PLANE OF THE BED.THE CARRIAGES MADE OF WELL SEASONED CAST IRON HAVE A SPRING LOADED CLAMPING ARRANGEMENT SO THAT THEY DO NOT SHIFT WHEN CLAMPED IN POSITION . A VERNIER READING TO 0.1 MM IS PROVIDED.

X-Y-Z CARRIAGE : THIS CARRIAGE HAS THE PROVISION TO TRANSLATE UPTO 25MM IN X AND Y DIRECTIONS WITH TWO PRECISION MICROMETERS LC 0.01 MM.A LARGE KNURLED NUT IS PROVIDED FOR VERTICAL Z MOTION UPTO 40 MM WITH A LEAST COUNT OF 0.1 MM.

X-Y-Z AND ROTATION CARRIAGE : THIS HAS AN ADDITIONAL ROTATIONAL MOVEMENT. THAN X-Y-Z CARRIAGE. NODAL SLIDER : IT IS USED FOR MEASUREMENTS OF FOCAL POINTS , ABBERRATIONS etc. LINEAR AS WELL AS ROTARY MOVEMENT IS PROVIDED .ANY LENS HOLDER OF 'BPI' MAY BE USED WITH IT.

FOCOMETER BENCH : COMPLETE WITH STANDARD ACCESSORIES , COLLIMATOR , MICROSCOPE & SLIDES etc. IT CAN MEASURE FOCAL LENGTH FROM -1200 TO 1600 MM. IT IS MOST SUITABLE FOR RESEARCH AND TESTING LABORATORIES FOR FOCAL LENGTH MEASUREMENT , CHECKING OF RESOLVING POWER , ABBERRATIONS AND OTHER PARAMETERS.

LIGHT TRANSMISSION MEASUREMENT BENCH : COMPLETE WITH COLLOMATOR ( 150 MM f.l. & 48 MM CLEAR APERTURE ) , IRIS DIAPHRAGM ( ( 2 - 20 MM AND 2 - 50 MM ) LIGHT SOURCE WITH CONDENSER , SET OF INTERFERENCE FILTERS COVERING VISIBLE AND NEAR IR RANGE , PHOTODETECTOR , MICROPROCESSOR BASED DIGITAL METER GIVING READING DIRECTLY IN TERMS OF PERCENTAGE .

Prod ID: OBR-4701

IT CONSISTS OF TWO STEEL RODS SUPPORTED ON HEAVY CAST IRON FEET WITH LEVELLING SCREWS.THE HORIZONTAL RODS ARE MADE OF COLD ROLLED STEEL ON WHICH CLOSE TOLERANCE ARE MAINTAINED FOR STRAIGHTNESS .IT IS 150 CM LONG HEAVILY NICKEL PLATED WITH GRADUATION IN MM.

Prod ID : SOB-4702

SADDLE : THESE SADDLES ARE MADE OF SEASONED CAST IRON.THE VERTICAL PILLAR IS 6 CM LONG WITH A INTERNAL DIAMETER OF 12.7 MM.
SADDLE : IT HAS THE PROVISION FOR TRANSVERSE MOTION. REST SAME AS ABOVE.
A ) DOUBLE ROD LENS HOLDERS : FOR LENSES UPTO 62 MM DIAMETER.
B ) SPRING LENS HOLDERS : FOR LENSES UPTO 50 MM DIAMETER.
C ) UNIVERSAL LENS HOLDERS : FOR ROUND AND SQUAR OPTICAL COMPONENTS UPTO 60 MM DIA OR WIDTH. THE COMPONENTS IS HELD BY 3 JAWS AT 90 DEG TO EACH OTHER. A PROVISION FOR COARSE AND FINE ROTATION OF THE COMPONENT IS PROVIDED.
D ) SELF CENTERING LENS HOLDER : FOR LENSES UPTO 50 MM DIAMETER. A LEVER IS PROVIDED TO GIVE SMOOTH MOTION TO THREE SPRING LOADED ARMS.
E ) ADJUSTABLE DOUBLE LENS HOLDER : IT CAN HOLD TWO LENSES OF DIA UPTO 60 MM , THE DISTANCE BETWEEN THE LENSES CAN BE ADJUSTED WITH A RACK AND PINION ARRANGEMENT.

Prod ID : SOB-S-4703

ADJUSTABLE SLITS : THESE ARE USED TO CONTROL THE LIGHT FROM ITS SOURCES IN A WIDE VARIETY OF APPLICATIONS,ULTRA FINE ADJUSTMENT OF LIGHT LINE CAN BE MADE IN KNURLED KNOB.THE PARALLEL KNIFE EDGE JAWS MOVE IN DOVETAILED GUIDES.THE SLITS HAVE AN APERTURE OF 6 MM.

Prod ID : SOB-AS-4704

A ) SIMPLE SLIT ( GERMAN SILVER ):
B ) STANDARD SLIT ( STAINLESS STEEL ):
C ) MICROMETER SLIT : STAINLESS STEEL, WITH MICRO METER READING TO 0.01 MM
D ) BOTH JAWS MOVING SLIT : MADE OF STAINLESS STEEL .PROVIDED WITH A KNURLED RING TO MOVE BOTH JAWS SIMULTANEOUSLY.THIS SLIT IS VERY USEFUL SINCE THE ALIGNMENT OF THE SLIT IS NOT DISTURBED.

MICRO METER EYE PIECES : USED ON OPTICAL BENCH TO MEASURE SMALL DISTANCES BETWEEN IMAGES , FRINGE WIDTH AND A WIDE VARIETY OF OTHER APPLICATIONS . A LEAD SCREW OF ½ MM PITCH IS PROVIDED HAVE 8x MAGNIFICATION .THE MICRO METER DRUM IS DIVIDED IN 50/100 PARTS.

MICRO METER EYE PIECES,STANDARD ( L C 0.005 MM ) : THE CARRIAGE FOR MOVING THE CROSS LINE MOVES IN ACCURATE GUIDES AND HAS A TRAVERSE OF 20 MM.THE COMPLETE MECHANISM IS ENCLOSED IN A ALUMINIUM CAST BODY.

MICRO METER EYE PIECES,PRECISION ( L C 0.005 MM ) : A BRASS SLIDE HOUSES THE EYE PIECE ASSEMBLY AND RETICLE.THE SLIDE MOVES IN A SEASONED C.I. GUIDE.

MICRO METER EYE PIECES,SIMPLE ( L C 0.01 MM ) : A BRASS SLIDE HOUSING THE EYEPIECE AND RETICLE ASSEMBLY MOVES IN AN ALUMINIUM GUIDE.

RAMSDEN EYEPIECE ( MAG.8Xdia , 19 mm ) IRIS DIAPHRAGMS AND PIN HOLES : IRIS DIAPHRAGM FROM 2 TO 20/50 MM. SET OF PIN HOLES OF 0.1 MM , 0.3 MM , 0.5 MM & 1 MM.

PHOTO METERS : THEY ARE USED FOR VISUAL COMPARISON OF LIGHT INTENSITIES.THE PHOTO METERS ARE MOUNTED ON A 12.7 MM ROD AND ARE SUITABLE FOR USE ON ' BPI OPTICAL BENCHES.
A ) BUNSEN GREASE SPOT PHOTO METER :
B ) LUMMER-BRODHUM PHOTO METER : THE COMPLETE PRISM ASSEMBLY IS MOUNTED IN A METAL CASE .THE ILLUMINATING POWER OF TWO LIGHT SOURCES CAN BE COMPARED WITH THE HELP OF A SIGHTING TELESCOPE.
C ) JOLLY'S PHOTO METER : IT CONSISTS OF A TWO PIECE POLYTHENE BLOCK 25 MM SQUAR , 10 MM THICK FITTED ON A WOODEN STAND . A 12 MM APERTURE IS PROVIDED.

ACCESSORIES FOR INTERFERENCE EXPERIMENTS : WITH THE HELP OF THESE ACCESSORIES WE CAN MEASURE THE WAVE LENGTH OF LIGHT BY MAKING MEASUREMENTS OF INTERFERENCE FRINGES.
A ) YOUNG'S DOUBLE SLIT : IT COMPRISES OF A DOUBLE SLIT 10 MM .LONG WITH 1 MM SEPARATION HOUSED IN A FRAME . A SCREW IS PROVIDED FOR FINE ADJUSTMENT IN THE VERTICAL PLANE.
B ) FRESNEL'S BI-PRISM : THE BI-PRISM HAS AN INCLUDED ANGLE OF 178 DEG.
C ) LLOYD'S MIRROR : USED ON A OPTICAL BENCH TO REFLECT THE INCIDENT BEAM WHICH PRODUCES INTERFERENCE FRINGES WITH UNDEVIATED BEAM OF LIGHT FROM THE SAME SOURCE.
D ) FRESNEL,S DOUBLE MIRROR : A SINGLE BEAM OF LIGHT IS REFLECTED FROM TWO MIRRORS AND INTERFERENCE FRINGES ARE PRODUCED BETWEEN THEM.

OTHER ACCESSORIES : CENTERING PIN.
................................: VEE SUPPORT .
................................: PROJECTION BULB.
................................: FOCAULT'S KNIFE EDGE.

ALSO AVAILABLE BENCHES : PHOTO METER BENCH.
........................................: STANDARD OPTICAL BENCH.
........................................: BI-PRISM EXPERIMENT ON SENIOR OPTICAL BENCH.

SIMPLE PATTERN,COMPRISING WOODEN BASE WITH 1 METER SCALE GRADUATED IN MM FIXED ALONG THE FRONT EDGE.COMPLETE WITH 2 LENS HOLDERS, ONE CANDLE HOLDER,PIN HOLDER,WIRE GAUGE SCREEN , GROUND GLASS SCREEN,PRISM TABLE AND ONE NEEDLE WITH INDEX MARKED.

Prod ID : OB-4705

FOR OPTICAL EXPERIMENTS , AVALABLE IN 50 & 75 MM LENGTH IN PLATED BRASS AND IRON.
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Prod ID : POP-47051 + SIZES