The concave lenses were studied in more detail in order to demonstrate possible applications of hybrid glass micro-optics. For that the agZIF-62 substrate containing imprinted lenses was placed on a diffraction grating with vertical and horizontal lines, forming a defined square mesh with a size of 50 µm (Carl Zeiss Jena, 20 lines per mm) (Figure ). Utilizing an optical microscope, we observed a sharp demagnified grating pattern in the focus of the lenses (Figure ). Compared to the real object size of 50 µm, the diameter of a virtual square in the focal plane of the lens was found to be 9 µm (Figure ), determining the lens magnification of 0.18 in this case. The same lens was then compared to its parent silica template using LSM (Figure ); relatively smooth 2D profiles (Figure ) were obtained from the corresponding LSM images, and their curvatures were fitted with circles using Confomap software. Very close diameters of the fitting circles (48.8 and 46.4 µm) demonstrate that the imprint almost perfectly reproduced the intended template shape, only lacking the depth, which, as discussed above, can be either predicted or controlled. By applying the lensmaker's equation to the investigated plano-concave lens, the focal length f = -39.99 µm was calculated (SI). This value agreed with the experimentally observed focal length, -38.24 µm, which was obtained by multiplying the optical path between the lens and the focal point by the refractive index of agZIF-62.