IFU prototype with 125µ lenslet size. (A) Bundle front face. (B) Same view as (A) after the MLA has been printed on it. (C) Side view of the MLA, with illumination from the back, showing some of the printing structure. The lenslet height is 0.7726 mm. D) Three-quarter view showing the seven lenslets. A laser source is injected from the fiber to the lenslet for one of them. Diffusion in the lens material shows the beam.