Tools of the trade - Vol 18 - Thorlabs - (Version JPG) - Page n° 659 - PDF Catalogue | Technical Documentation

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Optics


		optical Systems
		PPLN Devices
	Sp	herical Singlets

Equilateral Dispersive Prism

Dispersive Equilateral Prisms have lower stray light and none of the higher order problems associated with diffraction gratings. Two high refractive index, low Abbe Vd number glasses have been chosen to provide the maximum dispersive power. The Abbe Vd number is calculated by:

^{Multi-element} ^Lenses


	Cylindrical Lenses
	A	spheric Lenses

Yd:

n_F - n_c

where np and nc are the indices of refraction for the helium d-line (587.6nm), the hydrogen p-line (486.1nm) and the hydrogen C-line (656.3nm). prom the formula, An = np - nc is a measure of dispersion. A higher value of An yields a lower Vd, and a greater dispersion. Such prisms are typically used at the minimum angle of deviation. This is the angle where the wavelength of interest travels parallel to the base of the prism and the angle of incidence is equal to the angle of refraction when measured to the normal of the face of the prism at the respective interface. At the minimum angle of deviation, a maximum clear aperture is achieved and reflective loss in the P-polarization is reduced due to the close proximity to Brewster's angle of the incident light. For S-polarization, an anti-reflective coating will enhance transmission.

Windows

& Diffusers

Prisms

Gratings

iffractive Optics

olarization Optics

Beamsplitters

Filters & Attenuators

Swivel Mount: 60mm Cage System See Page 212

Specifications

■ Materials: P2 or SF11 (See Price Table)

■ Dimensional Tolerances: ±0.15mm

■ Angular Tolerances: ±5 arcmin

■ Surface Quality: 40-20

■ Surface Flatness: A./10 (70% of Clear Aperture)

Prism, PM2 and Base not

included -4

SF11 stains easily. Clean off fingerprints quickly and this optic will last.


							AX	Vd (see note 2)	INDEX n @ 633nm
ITEM#	$		€	¥	A=B=C=H	GLASS	A9 (see note 1)	Vd (see note 2)	INDEX n @ 633nm
PS850	$ 76.00	£ 57.00	€ 79,80	¥ 12,920	10mm	F2	150nm/degree	36.37	1.617
PS851	$ 86.00	£ 64.50	€ 90,30	¥ 14,620	10mm	SF11	67nm/degree	25.76	1.779
PS856	$ 82.00	£ 61.50	€ 86,10	¥ 13,940	15mm	F2	150nm/degree	36.37	1.617
PS857	$ 90.00	£ 67.50	€ 94,50	¥ 15,300	15mm	SF11	67nm/degree	25.76	1.779
PS858	$ 88.00	£ 66.00	€ 92,40	¥ 14,960	20mm	F2	150nm/degree	36.37	1.617
PS859	$ 90.00	£ 67.50	€ 94,50	¥ 15,300	20mm	SF11	67nm/degree	25.76	1.779
PS852	$ 98.00	£ 73.50	€ 102,90	¥ 16,660	25mm	F2	150nm/degree	36.37	1.617
PS853	$ 98.00	£ 73.50	€ 102,90	¥ 16,660	25mm	SF11	67nm/degree	25.76	1.779
PS855	$ 216.00	£ 162.00	€ 226,80	¥ 36,720	40mm	SF11	67nm/degree	25.76	1.779
PS854	$ 198.00	£ 148.50	€ 207,90	¥ 33,660	50mm	F2	150nm/degree	36.37	1.617

¹ AX/A8 is calculated for a 633nm HeNe Laser with the prism angle set such that the light rays pass through the prism parallel to its base (i.e. minimum deviation angle).

V = n_d - 1

² The Abbe number is calculated by ^d = np - nc where nd, np and nc are the indices of refraction for the helium D-line (587.6nm), the hydrogen p-line (486.1nm) and the hydrogen C-line (656.3nm).

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Tools of the trade - Vol 18 - Thorlabs - #659

Measuring device, Fiber optic cable, Optical diffuser, Nano-positioner, Translation stage