IDR300 Double Monochromator

  • IDR300 integrated monochromator with picoammeter
  • IDR300 integrated monochromator with picoammeter

Composed of two 300mm focal length, triple-grating turret Czerny-Turner monochromators arranged for additive dispersion, the IDR300 has a solenoid-based swing away mirror at the exit of both halves. This provides a single monochromator exit port and two double monochromator exit ports, allowing the specification of up to three system detectors. Grating drive control electronics are located to the base of the unit alongside the signal recovery electronics required to interface the three detectors, including two dual-channel picoammeters and a high voltage power supply for operation of detectors in the photoemissive or photoconductive modes.

The IDR300 is a single unit with a lot of talents, ready for deployment in a number of applications.

Core benefits

Features

  • Two 300mm focal length monochromators in Czerny-Turner mount
  • Triple grating turrets
  • One entrance and three exit ports, all motorised with automated mirror-based selection
  • Integrated drive electronics, two dual-channel picoammeters and high voltage power supply
  • Compatible with the full range of sources, detectors and accessories of the Bentham portfolio
  • Fully automated through USB 2.0 interface

Optical Layout

Configuration

Pair symmetrical Czerny Turner monochromators arranged for additive dispersion

Focal length

Total focal length: 600mm

Individual units: 300mm

Grating mount

Triple grating turret

Number of gratings

1-3

Grating size

68 x 84mm

Aperture ratio

f/4.1 (at all grating angles)

Number of entrance/ exit ports

1/2 or 2/1 on both monochromators

Opto-Mechanical

Mechanical resolution drive

0.000072°/ step

Slit type

Motorised variable slit

Slit width & height

10µm-10mm (W) x 20mm (H)

Filter size

25mm diameter

Optical Performance (quoted for 1200 g/mm gratings)

Spectral range

Within range 200nm-50µm

Linear dispersion

1.35nm/mm

Wavelength accuracy

± 0.1nm

Wavelength reproducibility

± 0.025nm

Resolution full/reduced slit height

0.15/ 0.05nm

Stray light rejection at 2.5 FWHM (single mode)

10-4

Stray light rejection at 2.5 FWHM (double mode)

10-8

Wavelength acquisition speed

2000nm/s

Automation

Computer interface

USB 2.0

Software control

BenWin+/ SDK

Electrical/ Mechanical

Overall dimensions

624L x 375W x 255H mm

Optical height

168mm

Weight

Approx. 30 kg

Power supply

Mains input 110/220V 50/60Hz

487 Dual-Channel Picoammeter Module - Electrical

Channel 1 input

Current input to picoammeter

Channel 2 input

Current input to picoammeter

Channel 3 input

Current input to picoammeter

Channel 4 input

Current input to picoammeter

Gain ranges

1010-105 V/A

Maximum current Input

100µA

Frequency response

DC to 30Hz

Gain accuracy

+1%

Gain stability

200ppm/°C

Output stability

5ppm/°C to 500ppm/°C depending on sensitivity

Linearity

< 0.025% departure from linearity from zero to full scale

ADC resolution

4½ digit BCD (0 to 19999) i.e. > 14 bit resolution

ADC integration time

100ms

Auxiliary input range

0- 9.8V

Picoammeter input impedance

Virtual earth

Auxiliary input impedance

1 MΩ

415 High voltage Power Supply Module - Electrical

Output voltage range

-350 to -1500V

Maximum current

1.5mA

Temperature stability

100 ppm/°C

Stability to voltage fluctuations

25ppm for 10% change in line voltage

Ripple and noise

100ppm peak-peak

Options

Diffraction gratings

See Configurations Tab

Order sorting filters

See Configurations Tab

Filter wheel

252-8 (8-position filter wheel, includes shutter)

Monochromator Configurations

IDR300 Configuration

 

Diffraction Gratings

Where a system is to be used over an exceptionally wide spectral range, requiring more than 3 diffraction gratings, interchangeable turrets are employed; the stepping motor in this case drives a platform to which the grating assembly is attached.

Grating

Line density (g/mm)

Grating type & Blaze wavelength

Maximum wavelength range

GA-T324R0U25

2400

Plane ruled, 250nm blaze

200nm-600nm

GA-T324H0U25

2400

Plane holographic, 250nm blaze

200nm-600nm

GA-T324H0U3

2400

Plane ruled, 300nm blaze

200nm-600nm

GA-T318H0U25

1800

Plane holographic, 250nm blaze

250nm-900nm

GA-T318R0U4

1800

Plane ruled, 400nm blaze

250nm-900nm

GA-T318R0U5

1800

Plane ruled, 500nm blaze

250nm-900nm

GA-T312H0U25

1200

Plane holographic, 250nm blaze

300nm-1.2µm

GA-T312R0U4

1200

Plane ruled, 400nm blaze

300nm-1.2µm

GA-T312R0U5

1200

Plane ruled, 500nm blaze

300nm-1.2µm

GA-T312R0U75

1200

Plane ruled, 750nm blaze

300nm-1.2µm

GA-T312R0U9

1200

Plane ruled, 900nm blaze

300nm-1.2µm

GA-T312R1U0

1200

Plane ruled, 1µm blaze

300nm-1.2µm

GA-T3083R1U2

830

Plane ruled, 1.2µm blaze

600nm-1.8µm

GA-T306R1U0

600

Plane ruled, 1µm blaze

800nm-2.5µm

GA-T306R1U25

600

Plane ruled, 1.25µm blaze

800nm-2.5µm

GA-T306R1U6

600

Plane ruled, 1.6µm blaze

800nm-2.5µm

GA-T306R1U9

600

Plane ruled, 1.9µm blaze

800nm-2.5µm

GA-T306R2U16

600

Plane ruled, 2.16µm blaze

800nm-2.5µm

GA-T304R1U6

400

Plane ruled, 1.6µm blaze

1µm-3µm

GA-T303R3U0

300

Plane ruled, 3µm blaze

1.5µm-5.5µm

GA-T303R4U0

300

Plane ruled, 4µm blaze

1.5µm-5.5µm

GA-T3015R4U0-AU

150

Plane ruled, 4µm blaze. Gold coated.

3µm-10µm

GA-T3015R6U0-AU

150

Plane ruled, 6µm blaze. Gold coated.

3µm-10µm

GA-T301R9U0-AU

100

Plane ruled, 9µm blaze. Gold coated.

4.5µm-16µm

GA-T30075R10U0-AU

75

Plane ruled, 10µm blaze. Gold coated.

6µm-20µm

GA-T30075R12U0-AU

75

Plane ruled, 12µm blaze. Gold coated.

6µm-20µm

GA-T3005R18U0-AU

50

Plane ruled, 18µm blaze. Gold coated.

9µm-30µm

GA-T3005R19U5-AU

50

Plane ruled, 19.5µm blaze. Gold coated.

9µm-30µm

Filters

An order sorting filter wheel is located inside the entrance port of the monochromator, fitted with 6 filters selected for the spectral range of use.

When measuring below 400nm, no filters are required as the corresponding wavelength of the subsequent diffraction order is less than 200nm, which is naturally blocked by the atmosphere.

Spectral range

Required OS filter

<400 m

None

400-700nm

OS400

700-1250nm

OS700

1250-2000nm

OS1250

2000-3600nm

OS2000

3.6-6 µm

OS3600

6-10.5 µm

OS6000

10.5-21 µm

OS10500

> 21µm

Please consult.

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