Abstract: A new kind of depolarizer consisting of three parts(one is canted quartz crystal and the other two are canted fused quartz glasses) is designed. Two such depolarizers are used together (the principal axis of the second are at 45° to that of the first one) to depolarize the incident linear-polarized light. The depolarizing result is observed not only by birefringent prism and an infra-sensitive card but also a polar analyst, and in both ways results of good depolarized light are observed. And the depolarizing result is insensitive to polarizing direction of the incident light.