Folded optics and replicable mechanics
Design optimisation, performance estimation, portable construction and collimator engineering.
Research record
EXOhSPEC publications.
Peer-reviewed journal articles and proceedings spanning optical and mechanical design, flexible reduction, active control, fibre behaviour, modal noise and calibration.
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DOI
Use of solid fused silica etalon with broad-band metallic coatings for calibration of high-resolution optical spectrograph
S. Ghosh, W. Martin, K. Kunverji & H. R. A. Jones
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DOI
A study of transmission properties in tapered graded-index fibre
P. Choochalerm, B. Martin, H. Jones & S. Usher
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DOI
Mitigating modal noise in multimode circular fibres by optical agitation using a galvanometer
S. Ghosh et al.
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Paper
Incoherent light in tapered graded-index fibre: a study of transmission and modal noise
P. Choochalerm et al.
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DOI
A small actively-controlled high-resolution spectrograph based on off-the-shelf components
H. R. A. Jones et al.
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Paper
Transmission properties of tapered optical fibres: simulations and experimental measurements
P. Choochalerm et al.
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DOI
HiFLEx — a highly flexible package to reduce cross-dispersed echelle spectra
R. Errmann et al.
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DOI
EXOhSPEC folded design optimization and performance estimation
E. Lhospice et al.
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DOI
Highly replicable, low-cost, portable, general-purpose, high-resolution spectrometer
A. Baker et al.
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DOI
EXOhSPEC collimator mechanical design
S. Kawinkij et al.
Research map
How the literature fits together
The publication record follows the full instrument chain.
The papers are not a single linear specification. Together they document optical architecture, mechanics, illumination, reduction, calibration and active control across different experiments and configurations.
Actively stabilised spectroscopy
The compact spectrograph paper connects component choice, metrology and active correction.
Tapered fibres and modal-noise mitigation
Simulation and experiment examine transmission, graded-index behaviour and optical agitation.
Reduction software and wavelength reference
HiFLEx supplies the reduction route; the metalon work develops a broad-band calibration component.
Reading rule: use each paper's stated instrument,
method and date. A design target or result in one publication should
not be silently transferred to another configuration.
Programme documents
Technical background.
Three primary technical routes into the instrument: optical design, telescope acquisition and guidance, and the open reduction pipeline.
PDF · OPTICAL ARCHITECTURE
Design outline
The compact folded spectrograph concept, principal components and intended high-resolution measurement path.
Read the design document → PDF · TELESCOPE INTERFACEAcquisition and guidance unit
Fibre injection, acquisition imaging and guiding context for the telescope-facing instrument system.
Read the AGU document → CODE · DATA REDUCTIONHiFLEx source
Open processing software for extracting and calibrating echelle spectra before scientific interpretation.
Open the source repository →