A study of the effects of 60Co gamma radiation on the transmission of lanthanum flint and lanthanum crownglasses was presented for application in space optics. The max total dose attained was 10 kGy, and the experimental resultsshow that the visible transmission for all samples decreases, while the nearinfrared transmission shows a slight decrease.Although the transmission of the lanthanum flint glass LaF10 is the minimum of all samples before irradiation, it also showsa minimum transmittance loss after irradiation. The total accumulated radiation doses with and without a 10 mm thick Al shielded layer are simulated for the eight orbits of different altitudes in a 10 year mission. The simulating results indicate
that in 3 000 km, 6 000 km and 10 000 km orbit altitudes, a thicker shielded layer is required to reduce the total dose,while in the other five orbits, a 10 mm thick Al layer is enough for satisfying the optical system performance.