Model 2035 Czerny-Turner Monochromator for Scanning and CCD Array Spectroscopy Experimentation f/4.8 High Throughput Optics High Efficiency Broadband Al+MgF2 Coatings Precision Micrometer Adjustable Slits Dual Turret with "Snap-In" gratings Gratings rotate about their apex Imaging Optics & Large focal plane Rugged Construction with Multiple slit locations

The Model 2035 Czerny-Turner spectrometer has a focal length of 350-mm and aperture ratio of f/4.8. This instrument uses a concave optic to collimate the incoming radiation. A plane grating is used to diffract the radiation that is subsequently focused by a second concave mirror. Czerny-Turner instruments require the center of the grating to be mounted directly over its center of rotation. This fixes the diffraction angle and provides the user with a fixed trajectory exit beam. This keeps accessories after the exit slit on the optical axis and delivers a flat and fixed focal plane.

The Model 2035 has a high performance optical system. The Model 2035 utilizes master concave collimating and focusing optics polished to 1/8th wave. The high quality optics provide excellent performance from the Infrared to the Deep UV. This system is limited by the atmospheric cut-off (185-nm) and is available with fittings for purge gas. Spectrally agile, the Model 2035 features first surface optics with Aluminum and Magnesium Fluoride coatings for broadband response. To favor Infrared applications other optical coatings like Gold or Silver can be provided.

Wavelengths from 200-nm to 78-um can be covered within the scanning range and with appropriate gratings. Wavelength control is via the 789A-3 digital scan control . The stepper drive (refer to Model 789A-3) is interfaced for operation via PC.

The Model 2035 optical system is optimized for two modes of operation. Instruments may be equipped with spherical optics for optimal spectral resolution. Spherical optics introduce astigmatism to the system that is not desirable in multi-channel fiber or other imaging applications. Configured for imaging the Model 2035 is equipped with an asphere to reduce astigmatism. Learn about the Model 2035 for imaging here.

PDF format Data Sheet for the high throughput Model 2035 available here

Specifications

McPherson Model 2035 350-mm focal length f/4.8 Monochromator / Spectrometer

Focal Length	350-mm, Czerny Turner design Monochromator / Spectrometer
Slit Locations	Axial and lateral with optional extra entrance and exit port selection mirrors
f / No.	4.8 with turret or single grating holder
Grating Size	68 x 68-mm
Wavelength Accuracy	+/-0.2-nm (on counter, with 1200 G/mm grating)
Wavelength Reproducibility	+/- 0.005 nm (with 1200 G/mm grating)
Focal Plane	25-mm, multiply dispersion by the width of your detector for range
Wavelength Range	refer to grating of interest for range

Performance of the Model 2035 with various gratings:

Grating (G/mm) (others available)	2400	1800	1200	600	300	150	75	50
Wavelength Range from 185-nm to	650-nm	860-nm	1.3-um	2.6-um	5.2-um	10.4-um	20.8-um	78-um
First Order Littrow Blaze	240 nm	holo	250 nm	300 nm	750 nm	1.25 um	2.0 um	45 um
	300 nm		300 nm	500 nm	1.0 um	2.5 nm	3.0 nm
	holo		500 nm	750 nm	3.0 um	4.0 um	8.0 um
			750 nm	1.0 um	4.0 um	6.0 um	10.0 um
			1.0 um	1.85 um		8.0 um	12.0 um
Resolution (nm) at 313.1-nm	0.025	0.03	0.05	0.10	0.20	0.40	0.80	1.20
Dispersion (nm/mm)	1	1.5	2	4	8	16	32	48

---

Salient Features

• Exit ports may be equipped with bilaterally adjustable slits, as used in scanning applications, or with adapters for selected CCD or PDA array detectors.
• Holds chosen ruled or holographic gratings.
• Available with a dual (2) grating turret. Single gratings feature kinematic mounts for ease of installation and exchange. Both types of grating holders permit simple and precise positioning. Additional gratings can easily be installed.
• Robust, high accuracy wavelength drive and mechanical wavelength readout insure easy use. The sine drive delivers a linear relationship between motor motion and wavelength of interest.
• The high precision drive may be actuated manually, via stepper motor controller or from the PC.
• Supplied with side and/or front mounted slit assemblies. Side ports are accessed by 90-degree mirror assemblies which are optionally motor driven.
• Imaging optical system easily adapts to commercial PDA and CCD type detectors. The mechanical interface for uncommon detectors will be manufactured to order.
• Precision bilaterally adjustable slit assemblies. Width is variable by micrometer from 10-um to 4-mm. The micrometer is directly readable to 10-um. Slit height is adjusted by occulter from 2-mm to 20-mm. The slits are optionally motor driven.
• The wide range of available accessories allows configuration of optimized systems and facilitates changing experimental needs.
• Heavy duty aluminum construction for high stability with respect to vibration and thermal effects.
• Outperforms and exceeds specifications of comparable monochromators in resolution, dispersion, wavelength accuracy, and wavelength reproducibility.