CPR Physics Optics

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CROWN" has been the leading manufacturer and exporter in the scientific and laboratory industry since 1968. Founded by Mr. K.R.Upadhyaya (1932-2009), the company has come a long way since then and is now being run successfully by the third generation of the family. To mark our presence on the global front we opened an office in New Jersey (US) in the year 2000 and projected a business growth of $16 Million.

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It consists of one plano-convex and the other plane glass plates of 60mm dia, both optically polished and mounted together in a baked black enamel finish metal frame with three plated brass screws to adjust pressure between the plates.

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Made from optical quality polished glass with ground edges. Consists of one each of double convex, plano-convex, concavo-convex, double concave, plano-concave and convexo-concave packed in a velvet lined case.

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Comprising a multi colored metal disk of 150mm dia mounted on a metal stand and driven by belt with the help of driving wheel fitted with a handle, hand operated.

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Mounted between two glass plates with four different numbers of lines per mm.

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• CPR-631A - 100 lines per mm
• CPR-631B - 200 lines per mm
• CPR-631C - 300 lines per mm                                
• CPR-631D - 600 lines per mm

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Colored, gelatine film, 50mm square card mounted. Colors are red, green, blue, yellow, magenta, cyan, orange and purple.

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A long single square rod accurately graduated is fitted on two sturdy metal feet with leveling screws. Four special designed heavy sliders having fine index marks. Two of the sliders are having fine transverse slow motion arrangement. Supplied with two lens holders and two optical pins.

Accessories For Optical Bench:

• CPR-647A - Centering or Parallax Pin, 100mm                 
• CPR-647B - Centering or Parallax Pin, 125mm                 
• CPR-647C - Pinhole Screen- Comprising of a circular black metal screen of 75mm dia with a center hole of 0.5mm dia approx, mounted on a 8mm plated brass rod.
• CPR-647D - Object Screen- Comprising of a circular metal screen of 75mm dia, painted with a 10mm central aperture covered with wire gauze, mounted on a 8mm plated brass rod.
• CPR-647E - Crosswire Screen- Comprising of a circular black metal screen of 75mm dia with a 10mm dia aperture and cross wires of 28 swg mounted on 8mm plated brass rod.
• CPR-647F - White Screen- Hardboard, 450mm square, one side enameled white. The plane side has two clamps to enable the board to be attached to a retort stand rod. 
• CPR-647G - Prism table- For supporting prism, glass blocks etc. A metallic disk of 80mm dia mounted on 6 or 9mm rod.
• CPR-647H - Adjustable Slit- Mounted on 8mm dia rod.
• CPR-647J -Adjustable Stand- Square or tripod metal base with baked enamel finish having plated brass pipe with thumbscrew to accommodate 8mm dia stem or rod. 

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This ray box set provides an inexpensive solution to the problem of equipping laboratories for individual student work in optics and color investigation. It can be used to perform experiments such as reflection, refraction, focal length determination and color mixing. A ventilated die cast alloy with baked enamel finish, lamp house having an open front with extended sides, finned externally for heat dissipation and vertical internal grooves to accommodate a slit plate and a cylindrical lens. It has a light source comprising a 12V lamp in a holder with 1 meter of twin flex wire having 4mm banana plugs. Complete with metal slit plate whitened on one side and the other side black matt having single and triple slits. Optics and color filters not included.

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This comprehensive set comprises a light box with a built-in collimating lens to generate divergent, convergent or parallel rays. Two integral hinged mirrors accept filters to provide three-color illumination for study of color mixing. The accessories supplied include a full set of precision lenses and prisms with handles for easy use which includes a double concave lens, a double convex lens, right angle prism, equilateral prism, triangular, rectangular and semicircular blocks together with plane, circular and parabolic mirrors. Also included are 8 color filters, 8 color cards, 2 slit plates and a spare lamp. Supplied in a strong, molded styrene foam pack with instruction book.

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9 x 16mm Gratings With 100, 300 AND 600 Lines Per Mm Mounted Between Glass Plates In 30 X 90Mm Card Slide.

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CPY-521         ACRYLIC PRISMS, SET OF 6

Made from clear acrylic sheet. All 15mm thick.

The set supplied in a box includes the following:-

 

Rectangular prism 75 x 50mm

Semi circular prism 90mm base

Equilateral prism, 75 x 75 x 75mm sides

Right angle prism 70 x 70 x 100mm

Convex prism 90mm long

Concave prism 90mm long.

Product Details:

CROWN" has been the leading manufacturer and exporter in the scientific and laboratory industry since 1968. Founded by Mr. K.R.Upadhyaya (1932-2009), the company has come a long way since then and is now being run successfully by the third generation of the family. To mark our presence on the global front we opened an office in New Jersey (US) in the year 2000 and projected a business growth of $16 Million.

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Two spherical lenses bi-concave and bi-convex with 38mm dia and 15.5cm focal length each, when used together give the effect of a plain glass. In other words, each lens neutralizes the other and gives a focal length of zero.

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To illustrate images produced by small apertures. Comprising a polished wooden box with a ground glass screen at one end and a hole at the other.

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Suitable for many quantitative light experiments. It comprises of a cast base with an integral fixed pillar for the collimator support and a swinging telescopic arm, both of which are fitted with an axis adjustment system. The moving telescopic arm with a spring loaded vernier moves slowly over a machine engraved degree plate of 180mm dia, with graduations of 0-360 x 1. The vernier reads to 0.1 or 6 seconds and allows pupils to estimate angular positions to 0.05, with fine adjustment. Optically coated achromatic objectives of 25mm dia are fitted into the collimator and the telescope tube and have a concealed helical action focusing device. The 10X Ramsden eye piece has a cross reticle. Prism table of 75mm dia is leveled with the help of three adjusting knobs. It is fitted with a clamp for holding a prism upto 38mm high and a diffraction grating holder of 25mm aperture. To help place the prism accurately, lines are marked on the table. All the parts are either plated or have a baked enamel finish. Includes a magnifying eye glass and a tommy bar for axis adjustment. Prism and diffraction grating not included.

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This spectrometer is designed with enhanced features for obtaining better quantitative light experiment results. It consists of a heavy cast base with a pillar for collimator support. The telescope arm moves along a 150mm dia, graduated, fixed circular plate. This plate has a double ended Vernier with a least count of 30º for better and accurate measurements. Fine adjustment is obtained by using a knob while the coarse adjustment can be done manually. Both the collimator and the telescope are mounted with an axis adjustment system. The telescope has a 10X Ramsden eye piece which is fitted with a cross wire. Coated achromatic objectives of 32mm dia and 178mm focal length are fitted into both the telescope and the collimator to provide light for a brighter and sharper image. The 6mm long collimator slit is specially designed for retention of initial accuracy during the life of the instrument. The prism table of 75mm dia is held with the help of a clamping screw which enables the table to be rotated in any required direction. It has lines and concentric rings marked to help position the prism in relation to leveling screw. It is fitted with a clamp for holding prisms upto 38mm high and a diffraction grating holder of 25mm aperture. Includes a magnifying eye glass, tommy bar for axis adjustment and flannel cloth. Prism and diffraction grating are not included.

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Made of wood with a slot to accommodate lenses and mirrors.

Product Details:

CROWN" has been the leading manufacturer and exporter in the scientific and laboratory industry since 1968. Founded by Mr. K.R.Upadhyaya (1932-2009), the company has come a long way since then and is now being run successfully by the third generation of the family. To mark our presence on the global front we opened an office in New Jersey (US) in the year 2000 and projected a business growth of $16 Million.