FIELD: protection of valuable papers, for example, bank notes, credit cards, certificates and cheque documents. SUBSTANCE: optical member has a carrier with diffusely reflecting right side and metallization with a surface seeming at an angle of Bragg reflection as metallic lustrous. The optical member is so made that the carrier right side has two carrier regions with a different height, in particular diffuse reflecting capacity for light; one partial region or several partial regions of each of the two carrier regions is metallized, respectively are metallized, and that the reflecting capacity of metallization in the directions of examination beyond the region of Bragg angles is less than or in essence corresponds to the reflecting capacity of the carrier regions with a high reflecting capacity, and exceeds or in essence corresponds to the reflecting capacity of the carrier regions with a low reflecting capacity. EFFECT: enhanced efficiency of protection against forgery. 14 cl, 8 dwg
