Optical engine and laser projection apparatus

An optical engine (10) and a laser projection apparatus, the optical engine (10) comprising: a light source assembly (100), an illumination assembly (13), a light valve (14), and an adjustment assembly (11), the light source assembly (100) being configured to provide an illumination beam, the illumination assembly (13) being configured to receive the illumination beam and perform optical path adjustment, the light valve (14) being configured to receive the illumination beam adjusted by the illumination assembly (13) and perform modulation to obtain an image beam, and the adjustment assembly (11) being configured to adjust the light path of the image beam to obtain a laser beam; the adjusting assembly (11) is configured to adjust the numerical aperture angle of a light beam irradiated to the light valve (14), the lighting assembly (13) comprises a first lens group (131), a second lens group (132) and a third lens group (133) which are sequentially arranged in the light path direction, the second lens group (13