Light source and laser projection apparatus

A light source, comprising:

• at least one laser array, a light combining assembly, and a fly-eye lens;
• wherein
• the at least one laser array is configured to emit at least two colors of laser light, wherein the at least two colors of laser light comprises a first wavelength laser light, a second wavelength laser light, and a third wavelength laser light, etendue of the first wavelength laser light being greater than etendue of the second wavelength laser light and etendue of the third wavelength laser light;
• the light combining assembly is disposed on a light-output side of the at least one laser array and is configured to guide the laser light emitted from the at least one laser array to the fly-eye lens;
• the fly-eye lens is disposed on a light-output side of the light combining assembly and is configured to homogenize the laser light emitted from the at least one laser array;
• wherein the fly-eye lens comprises:
• a substrate;
• a plurality of first microlenses disposed on a light-incident surface of the substrate;
• and
• a plurality of second microlenses disposed on a light-output surface of the substrate,
• wherein each of the first microlenses is configured to converge light to a center point of the second microlens correspondingly disposed on the light-output side, such that light emitted from the second microlens is emitted out at a certain divergence angle θ, wherein the certain divergence angle θ is greater than 0;
• wherein a size d of the first microlens in a target direction satisfies:
• d
• =
• D
• ×
• Sin
• ⁢
• θ
• T
• ×
• k
• ;
• wherein D represents a size of a light valve in the target direction;
• θ represents an imaging angle of a lens head, T represents a size of a light spot formed by a laser on a light-incident surface of the fly-eye lens in the target direction, k represents a proportionality coefficient greater than 0, and the target direction is a fast axis direction or a slow axis direction of laser light.