tcspc opcounts → countsimport fullseye as fs; fs.ledger.tcspc_irf_convolve(hist, bin_ps=100.0, irf_fwhm_ps=200.0, truncate=4.0) (実装を直接呼ぶなら import photoncount; photoncount.tcspc_irf_convolve(hist, bin_ps=100.0, irf_fwhm_ps=200.0, truncate=4.0)、台帳から引くなら opsphoton.get("tcspc_irf_convolve"))Blur an arrival-time histogram by the instrument response (timing jitter).
The temporal analogue of a PSF convolution: a detector’s timing uncertainty
(SPAD jitter + TDC quantisation + laser pulse width) smears every arrival
time by the instrument response function, here a Gaussian of full width at
half maximum irf_fwhm_ps. The kernel is the exact bin integral of that
Gaussian (erf differences), normalised to sum 1, truncated at
+-truncate*sigma and forced to odd length so the convolution is centred.
Ground truth: convolving a unit spike in the middle of a 256-bin window with
irf_fwhm_ps = 500 at bin_ps = 50 leaves the centroid exactly
where it was (measured shift 0.0 ps — the kernel is symmetric) and gives a
profile whose measured FWHM is 501.22 ps. That 0.24% excess over 500 is the
measurement, not the kernel: :func:tcspc_stats finds the half-maximum
crossings by linear interpolation between bins, which slightly overestimates
the width of a Gaussian.
Total counts are preserved except at the window edges, where
mode='same' discards the tail that falls outside — measured loss exactly
0 for that centred spike, but a genuine loss for a pulse within a few sigma
of either end.
Returns a float64 1-D histogram of the same length as hist.
Raises ValueError: negative, non-finite or non-1-D hist, a
non-positive bin_ps / irf_fwhm_ps / truncate, an IRF sigma below
1e-3 bins (the kernel would be a delta and the op a no-op — say so instead
of pretending to blur), and a kernel that would be longer than the
:data:MAX_BINS cap.
py -3.11 examples/photon_timeresolved.pycounts を入力に取れる)tcspc_coates_correct · tcspc_background_subtract · tcspc_stats · dtof_depth · lifetime_fit · lifetime_phasor
tcspc)tcspc_simulate · tcspc_background_subtract · tcspc_stats
Provenance: photoncount.py — PHOTON operator registry. この per-op ノートは tools/opdocs.py md が自動生成(手編集しない)。
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.