Imaging lens assembly

An imaging lens assembly comprising:

• an optical lens set including first, second and third optical lenses that are arranged sequentially from an object side to an image side along an optical axis of said imaging lens assembly,
• said first optical lens having a positive refractive power near the optical axis,
• said second optical lens having a positive refractive power near the optical axis,
• said third optical lens having a negative refractive power near the optical axis, and having an aspherical object-side surface that faces the object side, an asperhical image-side surface that faces the image side, and a peripheral surface interconnecting said object-side surface and said image-side surface, at least one of said object-side surface and said image-side surface of said third optical lens having at least one inflection point between the optical axis and said peripheral surface;
• and
• a constant-aperture diaphragm disposed between said second optical lens and the object side;
• wherein said imaging lens assembly satisfies the following optical condition:
• 0.55<f/Dg<0.85,
• in which, f represents a focal length of said imaging lens assembly, and Dg represents a length of a diagonal line of a maximum viewing angle in an imaging plane.