Retinal hazards and glare from space mirrors
Abstract
Projects of orbital mirrors reflecting sunlight towards Earth raise reasonable concerns regarding photochemical and thermal retinal hazards and detrimental effects on visual performance (disability glare). This paper addresses these issues based on some current eye safety and glare standards. Telescopic observations of single mirrors appear to pose a significant risk of photochemical retinal hazard. The risk is higher for vulnerable populations. Unaided eye viewing of a mirror keeps the retinal risks low, both photochemical and thermal; however, disability glare may be unacceptably high, affecting awareness and response in critical visual operations. The simultaneous presence of several mirrors in the visual field of the observer, seen with the unaided eye or through optical instruments, will significantly increase all types of hazards. The kind and severity of their combined effects will depend on the angular distance between them. Additional information is needed to evaluate the effects of the transient flashes of light during mirror slewing operations.
Related
- Impact of segmented deformable mirrors on high-contrast testbeds for exoplanet imaging with future large space telescopes: contrast stability assessment on the HiCAT bench
- Silencing the stellar glare with kernel-nulling and active phase control on photonic chips
- A Novel Arm-Length Stabilization Scheme for Gravitational-Wave Detectors with AlGaAs/GaAs Coated Mirrors
- Analytical Cosmological Collider at Strong Mixing in Laplace Space
- Induced field-space curvature from a heavy inflationary trough
BibTeX
@misc{bara2026retinal,
title = {{Retinal hazards and glare from space mirrors}},
author = {Salvador Bará},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.20878},
eprint = {2609.20878},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.20878},
note = {CC BY-NC-SA 4.0},
}
RIS
TY - UNPB
TI - Retinal hazards and glare from space mirrors
AU - Salvador Bará
PY - 2026
DA - 2026/09/16
PB - arXiv
DO - 10.48550/arxiv.2609.20878
UR - https://arxiv.org/abs/2609.20878
AB - Projects of orbital mirrors reflecting sunlight towards Earth raise reasonable concerns regarding photochemical and thermal retinal hazards and detrimental effects on visual performance (disability glare). This paper addresses these issues based on some current eye safety and glare standards. Telescopic observations of single mirrors appear to pose a significant risk of photochemical retinal hazard. The risk is higher for vulnerable populations. Unaided eye viewing of a mirror keeps the retinal risks low, both photochemical and thermal; however, disability glare may be unacceptably high, affecting awareness and response in critical visual operations. The simultaneous presence of several mirrors in the visual field of the observer, seen with the unaided eye or through optical instruments, will significantly increase all types of hazards. The kind and severity of their combined effects will depend on the angular distance between them. Additional information is needed to evaluate the effects of the transient flashes of light during mirror slewing operations.
ER -