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ACCESSORIES FOR OPTICAL BENCHES - PINHOLE SCREEN (0557)
Circular black metal screen about 75mm in diameter, with a central hole O. 6mm diameter approx. or rectangular 100x75mm
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ACCESSORIES FOR OPTICAL BENCHES - CANDLE HOLDER (0558)
Cylindrical metal holder cup shaped holder for supporting candles.
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ACCESSORIES FOR OPTICAL BENCHES - CROSS WIRES (0559)
A circular black metal screen about 75mm diameter has a 10mm diameter aperture with cross wires.
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ACCESSORIES FOR OPTICAL BENCHES - IRIS DIAPHRAGM (0560)
A circular black metal screen about 75mm diameter, with an adjustable iris diaphragm, maximum aperture 6mm.
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ACCESSORIES FOR OPTICAL BENCHES OBJECT SCREEN (0561)
A circular white metal screen 75mm diameter, with a 10mm central aperture covered with 1. 5 rpm wire mesh gauze.
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ACCESSORIES FOR OPTICAL BENCHES - ADJUSTABLE SLIT (0562)
Circular metal screen 75mm diameter, with a 12.5mm central aperture. A screw-controlled, spring-loaded precision slit is mounted on one side of the disc. Maximum slit opening 4mm approx. with a useful length of 10 to 12mm.
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ACCESSORIES FOR OPTICAL BENCHES - GROUND GLASS SCREEN (0563)
Rectangular screen. mounted in metal frame 100x75mm. with a central aperture of 63mm diameter.
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ACCESSORIES FOR OPTICAL BENCHES - PLANE MIRROR (0564)
Rectangular shaped silver-backed mirror. mounted in metal frame 100x75mm.
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ACCESSORIES FOR OPTICAL BENCHES - MICROMETER SLIT (0565)
Same as ADJUSTABLE SLIT but with a heavier screw thread of pitch 0.5mm, carrying a drum, which is divided Into 50 divisions giving a least count of 0.01mm. An index is provided with a 5mm scale graduated 0.5mm divisions.
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ACCESSORIES FOR OPTICAL BENCHES - LAMP 240V, WHITE (0566)
A 240V 15W white BC pygmy lamp in a conical lamp house. Mounted on a metal rod. Supplied with 1. 5m of twin flex connecting lead.
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ACCESSORIES FOR OPTICAL BENCHES - COMBINED OBJECT AND RECEIVING SCREEN (0567)
Comprising a rectangular black metal frame 150x 100mm, with an aperture and a removable white card screen. The card has an aperture with an index point for use as an object, or the card may be inverted and used as a receiving screen. Mounted on a base
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ACCESSORIES FOR OPTICAL BENCHES - PHOTOMETER, GREASE SPOT (0568)
For comparison of light intensity. Comprises a waxed paper screen with a wax-free central spot 16mm diameter mounted in a metal frame 100x75mm with central aperture of about 50mm.
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ACCESSORIES FOR OPTICAL BENCHES - STAND FOR OPTICAL BENCH ACCESSORIES (0569)
Comprising a metal pillar with hole for mounting uprights of accessories and lock-screw for securing them, mounted on a heavy base 60x60mm. An index line is engraved on one side of the base. Overall height 63mm.
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ACCESSORIES FOR OPTICAL BENCHES - STAND FOR LENS HOLDER (0570)
Comprising a stout metal pillar. the top slides between two parallel rods and has a groove for taking lenses/mirrors with clamping screw for securing its position.
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TELESCOPE (0571)
Comprising a plano-convex lens of about 3Bmm diameter x 150mm FL, mounted in a tube about 400x50mm [length x diameter), and a double convex lens of 50mm diameter 500mm FL, mounted in a tube 400 x 55mm diameter. The small tube is located in the large tube by means of foam plastic rings. which provide an effective sliding. Equipped with rod for stand mounting. Useful for terrestrial as well as astronomical viewing. Supplied without stand.
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