TDM - The Time-Domain Monochromator

The TDM monochromator features low temporal dispersion and high optical throughput, both of which are key requirements of time-domain spectroscopy.

Segment: Scientific

Division: Fluorescence Spectroscopy

Manufacturing Company: HORIBA Scientific

A versatile building block that can easily be incorporated into any optical system, its features include:

Full automation of wavelength, exit and entrance slits, and shutter
Choice of control interface: USB, or F-link for plug-n-play integration with DeltaFlex components
Integral shutter saves space and components in your optical path
(shutter may be controlled in software and/or electronically from your own interlock circuit e.g. to protect sensitive detectors)
Rugged, compact construction
Low time dispersion and high throughput

This unique range of features makes the TDM monochromator an ideal choice for applications requiring compact wavelength selection. Three models cover the spectral range from 200nm to 1600nm: TDM-800 (200-800nm), TDM-1200 (300-1200nm) and TDM-1600 (400-1600nm).

The TDM monochromator is a core component of our DeltaFlex range of fluorescence lifetime systems and is therefore readily available with a host of adapters and accessories such as our PPD detectors and diode light sources.

Model	TDM-800	TDM-1200	TDM-1600
*Focal length*	100mm
*Geometry*	Seya-Namioka with horizontal slit (vertical dispersion)
*Linear dispersion*	8nm/mm	12nm/mm	16nm/mm
*Numerical aperture*	f/3
*Spectral bandwidths* *(motorized)*	1, 2, 4, 6, 8, 12, 16 & 32nm	1.5, 3, 6, 9, 12, 18, 24 & 48nm	2, 4, 8, 12, 16, 24, 32 & 64nm
Spectral range (motorized)	200-800nm	300-1200nm	400-1600nm
*Typical* *Peak* *transmission*	62%@280nm	43%@490nm	33%@600nm
*Integrated shutter*	Yes	Yes	Yes
*Wavelength precision*	±1nm	±1.5nm	±2nm
*Grating*	Aberration corrected concave holographic
*Slit height*	8mm
*Stray light rejection*	10e^-5
*Temporal dispersion*	0.13ps/nm
*Control interface*	USB or F-link (please specify)
*Power requirements*	15V at 0.75A d.c.
*Dimensions*	171mm x 145mm x 111mm
*Weight*	3.9kg

Measuring PL Upconversion Spectra and Lifetimes of Lanthanide-Doped Nanoparticles

Upconverting lanthanide-based nanomaterials exhibit a unique fluorescence anti-Stokes shift, which enables them to convert NIR wavelength excitation into visible shorter wavelength emissions (NIR to UV-Vis).

Characterizing Lanthanides in Glasses for Optical Applications

Glasses are essential materials with a multitude of uses and many forms. In the area of optoelectronics there is an interest to modify the glass composition to favor the incorporation of lanthanide elements.

Upconversion of Lanthanide-containing glasses using DD‐980L excitation

The phenomenon of upconversion is an optical process that takes in lower energy (longer wavelength) photons and emits higher energy (shorter wavelength) photons.

Measurement of carrier lifetime in perovskite for solar cell applications

Hybrid perovskite photovoltaics (PV) show promise because of their good efficiencies, which can be around 20%. Along with their PV characteristics, perovskite materials exhibit a high degree of radiative recombination.

Time‐resolved luminescence of security inks from the UV to NIR

The use of security features, such as luminescent inks, has increased significantly in an attempt to prevent fraud and counterfeiting of materials and goods.

Time‐resolved Fluorescence for Monitoring Food Composition

The use of time‐resolved fluorescence has expanded as the relative cost of instrumentation has decreased in recent years. One area where this is especially true is in the food industry, where time‐resolved fluorescence has been applied in the characterization of food stuffs as well as aspects related to food safety and degradation.

Monitoring Whole Leaf Fluorescence Using Time‐resolved Techniques

Light incident on a leaf can be absorbed by chlorophyll to commence the photosynthetic cycle. Excess energy can be liberated as heat or by emission of fluorescence and this can be used to assess the efficiency of the photosynthetic process.

The Measurement of Singlet Oxygen Lifetime Sensitized using Rose Bengal

The study of singlet oxygen (1O2) is of interest, principally, as it is a highly reactive species. It can be produced by photosensitisation, usually of a molecule such as a dye or porphyrin. Thus, by the appropriate selection of sensitiser, the presence of oxygen and light, 1O2 can be selectively generated. From a biological aspect it has the ability to damage and destroy cells, which has lead to interest in its use as an anticancer agent in photodynamic therapy (PDT).

Effect of temperature on HSA structure inferred using time-resolved room-temperature phosphorescence

To access intrinsic amino acids, such as tryptophan, as probes, the UV excitation wavelengths for pulsed phosphorescence measurements have long been the preserve of low-repetition-rate gas-filled lamps or larger laser systems. Recent developments have enabled the use of interchangeable semiconductor diodes...

Investigating photocleavage using time‐resolved emission spectra

The choice of protecting group is of crucial importance in the success of many steps in organic synthesis and the manipulation of polyfunctional molecules, since they can prevent the formation of undesired side products and reactions.