{
  "pixels_per_wavelength": 35.0,
  "wavelength_nm": 4.365640788732394,
  "x0_nm": -3.804344115895372,
  "y0_nm": 0.0,
  "grid_ny": 258,
  "grid_nx": 62,
  "formula": {
    "pitch_nm": "wavelength_nm / pixels_per_wavelength",
    "x_nm": "x0_nm + ix * pitch_nm",
    "y_nm": "y0_nm + iy * pitch_nm"
  }
}