Examples of Investigation and Measurement

Refraction on a prism
On prisms of different material the beam of a laser is refracted. The deflection of the beam is investigated as a function of the incidence angle, the refraction index and the refraction angle of the prisms. By determining the angle of the minimum deflection the refraction index for the specific material of the prism can be evaluated.

Spectrum of white light
By using a white light source a continuous spectrum is generated by a prism and can be observed on a screen. Spatial recombination of the spectrum by a lens leads to the original white light. Blocking a certain colour in the spectrum leads to its complementary colour when recombined.

Fraunhofer prism spectroscope
A model of Fraunhofers apparatus is set up as follows:
Instead of a continuous spectrum the spectral lines of a spectral lamp are used to determine the prism’s dispersion of different materials. The spectral lines can be observed on a screen.

OXP-02 Required Equipment
1 1	02.0200 02.0300	Profile rail OCM 650, 200 mm Profile rail OCM 650, 300 mm The high precision optical rails are made out of special anodized aluminum. The rails are the base for various modules attached to carriers.
1	02.1022	Carrier OCM 650, 20 mm with screen holder This module can mount optical screens. Through the attached carrier, the screen holder can be placed onto the optical rail. The carrier 20 mm and the holder are made out of special anodized aluminum.
1	02.1602	Screen with scale Experimental results like colour spectra and interference patterns can be visualized on these screens. Horizontal or vertical scales allow calibrations and quantitative measurements; a screen with an aperture is used for observing back-reflected rays. The screens are made out of anodized aluminum plates with one side painted white and can be fixed onto screen holders (02.1022, 02.1608).
1 3	02.2126 02.2132	Mounting plate OCM 650 for click 25, including carrier 20 mm Mounting plate OCM 650 for click 30, including carrier 20 mm Mounting plates are used to hold optical mounts. A characteristic feature of the mounting plates is the “click” mechanism of the inserts based on spring loaded spheres. Snapping in the groove of the inserted click mount, the optical element is kept in an exact position. On the other hand, the system allows a quick and easy change of the mounted inserts. The mounting plates are made out of special anodized aluminum. Mounted onto the carrier 20 mm, the mounting plates can be placed onto an optical rail.
1	02.6106	4 axis adjustment holder KH650, theta, phi, X and Y, including carrier 20 mm This adjustment holder mounts a Diode Laser or an LED lamp. Using the fine pitch adjustment screws, the optical axis can be aligned within the range of 3 mm. For fine alignment of the angle of the light beam, two additional pitch adjustment screws are attached onto the back of the holder. The holder and the carrier 20 mm are made out of special anodized aluminum and can be placed onto an optical rail.
1 2	04.0022 04.0051	Achromate f=40 mm, mounted in click 30 mount Biconvex lens f=100, mounted in click 30 mount Different glass lenses are mounted onto a special anodized aluminum click mount 25 mm by two threaded mounting rings to be used in connection with a mounting plate (02.2126).
1	04.0044	Front surface mirror, mounted in click 25 mount A high quality front-surface plane mirror is mounted onto a special anodized aluminum click mount 25 mm by two threaded mounting rings. These are to be used in connection with a mounting plate (02.2126) as a fixed mirror, or in combination with a theta phi mirror adjustment holder (02.5400, 02.5600). Dia: 22,4 mm
1	05.0030	LED white in housing As universal and easy-to-change light sources, LED lamps are used in optical experiments. The LEDs are mounted onto a 40 mm x 25 mm diameter housing tube made out of special anodized aluminum. For the alignment, the lamps can be fixed onto a four axis adjustment holder mounted onto a carrier. For their operation, the active LDD-05 power supply (07.0206) is required which controls the output power. For the lamps 1 W (white LED: 3W), high brightness LEDs are used.
1	05.0106	Spectral lamp with slit and power supply This unit consists of a light source emitting descrete spectral lines in the visible range.The lamp in its housing is made out of special anodized aluminum fixed onto a mounting plate and can be placed onto an optical rail. The front aperture of the housing is a slit with 1 mm width, which is very helpful in spectrally resolving setups. The lamp is connected to a main switch unit with the following properties: voltage: 230 VAC / 50 Hz case dimensions: 200 mm x 160 mm x 62 mm
1	05.0226	DIMO diode laser module, 532 nm (green) Due to its collimated beam, this frequency doubled green YAG laser is an ideal light source for experiments dealing with ray tracing and beam propagation. The diode in its 40 mm x 25 mm diameter housing tube made out of special anodized aluminum can be fixed onto a four axis adjustment holder and can be aligned to the optical axis. Driven by the LDD-05 active power supply (07.0206), the output power is controlled in the range from 0 to 3 mW.
1	07.0206	LDD-05 active power supply The universal LDD-05 active power supply is used for all laser and LED light sources. It recognizes which source is connected and sets the parameters for it automatically. The unit is equipped with a main switch, a regulation knob for adjusting the laser or LED power and a safety lock. The provided USB bus interface allows control through a personal computer or laptop and qualifies this unit as multimedia source. The housing is made out of shock-proof plastic with an aluminum front and rear panel. Voltage: 230 VAC / 50 Hz Case dimensions: 200 mm x 160 mm x 62 mm.
1	09.1202	Prism assembly A hinged joint angle connector holds various prisms fixed onto a rotatable plate. The unit can be mounted onto two optical rails which can be set in a defined angle to each other. By adjusting the hinge angle, the beam deviation angle can be measured on a scale from -90 - +90° at intervals of 2°. For beam tracing within a prism, a 60° prism of fluorescent material is provided. For investigations of dispersion, two prisms of two kinds of glass are included.
1	09.1204	Magnetic carrier with beam block on post A beam block is mounted onto a rod which is rotatable and movable across the optical axis. The element on the rod is fixed onto a specially designed carrier 20 mm by magnetic forces. This unit is used to block a part of the spectrum of a beam. The unit is made out of special anodized aluminum. On the carrier 20 mm, a stainless steel plate is inlaid; on the rod, a round magnet is inlaid. Beam block area: 18 mm x 4 mm.