We supply compact and ultra-compact spectrometers from leading Taiwanese manufacturer OtO Photonics together with their user-friendly "SpectraSmart" spectral measurement software and a range of lamp- and LED-based light sources.
OtO offer a range of compact Czerny-Turner (C-T) and folded C-T cavity spectrometers along with curved-mirror C-T cavity (SilverBullet, RedBullet and GoldenBullet).
Czerny-Turner Cavity Spectrometers
Classic C-T spectrometers offer a number of key benefits:-
- High optical resolution
- High sensitivity
- Low stray light
- Fast spectral response
Variations on the classic Czerny-Turner cavity are used in OtO's folded cavity design (HummingBird, PocketHawk & PocketHawk-NIR) and the "Bullet" series which replace the separate collimating and focusing mirror optical elements with a single curved mirror performing both functions.
High Resolution Spectrometers
A range of high-resolution spectrometers are also available - targeting applications such as Raman; Optical Coherence Tomography (OCT); laser diode, VCSEL and LED testing and many others.
These high-resolution models feature a combination of reflective and transmissive components giving fully transmissive (T-T-T or T3) or Transmissive-Reflective-Transmissive (T-R-T) optical cavity designs as shown below:-
Basing these high resolution models on a C-T cavity designed for optimisation of grating, slit, spectral range and high-pixel-count CCD/CMOS/InGaAs ambient or TE-cooled linear sensors allows a very high degree of configurability. Standard models with specific operating ranges and resolution form the basis for application-specific solutions - so please contact us to discuss your own target specification as we are confident OtO have the platforms to meet your needs.
Micro-Electro-Mechanical Systems (MEMS) Spectrometers
OtO Photonics implements MEMS technology in two distinct families of spectrometers.
UltraMicro (330-850nm) and RedSparrow (900-1700nm) microspectrometers replace the "collimator-plane grating-focusing mirror" optical structure used in traditional Czerny-Turner spectrometers with a "non-spherical, mass-producible" micro-sized component which combines grating and focusing functions. The microchip concave grating technology leverages patented algorithms to calculate curvature and ray-tracing to eliminate aberrations and achieve high resolution. This innovative wafer-scale semiconductor grating-collimator chip enables significant size and cost reduction.
Advantages of OtO's MEMS-based include:-
- Small size and low power consumption
- Highly resistant to vibration
- Easy integration into OEM systems
- High volume production with low cost
A different MEMS-based approach is used for the DragonFly series covering 900nm to 2280nm. Here, OtO integrate Texas Instruments' Digital Light Processing (DLP®) technology.
The DLP component uses MEMS technology to produce an active array of micromirrors which are used to scan the spectrum over a single 1mm diameter active area photodiode.
This arrangement results in an extremely compact form-factor and reduced cost when compared to solutions using classic C-T cavity with InGaAs sensor arrays. Scanning a spectrum slowly can result in improved sensitivity - at the expense of a significantly longer period to gather a full spectrum, so it is necessary to consider the use-case in detail and we are available to discuss this.
DragonFly is offered with three standard configurations - ambient temperature and TE-cooled standard InGaAs for 900-1700nm and two versions with extended response TE-cooled InGaAs for 1250-2050nm and 1340-2280nm.
When combined with their high-precision optomechanical designs and SpectraSmart software all OtO Photonics spectrometers push the performance envelope to deliver the benefits of high accuracy, ultra-compactness, shock resistance, weather resistance and low cost.
Please use the Quick Links to the right of this page to view OtO's range or Contact Us if you would like to discuss your requirement for high performance, compact spectrometers covering the range 180nm to 2500nm.
