The photos above look ok to me for their intended purpose. :thup:
As Christine says, digital (or even non-digital in auto-focus mode) cameras may not easily focus on uv lighted subjects. So the solution is to use a camera that permits manual focusing ... or one that has a "pre-focus" control (press half way to focus then further press to fire the shutter).
To use a "pre-focus" control for a UV shot: In normal light, and with the UV light off, press the shutter to the pre-focus position - and hold it there. Then, switch on the UV light and switch off the normal lighting. Next, press the shutter button fully to take the picture. As long as the camera is in auto-mode for speed and aperture, it should sort out those settings when the lighting is changed.
That procedure may well require an assistant to do the swithing on / off of lights, but if you have the camera on a tripod and use a desk-lamp for normal lighting, you can quite easily operate all things having set them up close to each other, whilst, at the same time keeping one finger on the camera shutter release.
It should be noted that even if the camera does not refocus when the shutter is pressed fully, the picture may still look "somewhat fuzzy". But that is often an effect of a subject under UV light. Here is a shot I took recently of a couple of paperweights (but with a digital SLR camera so I could use manual lens focusing, but other settiings on auto). I also boosetd the sharpness of the finished photo by 150% to make things a bit crisper - but see how the green uv reaction for the left-hand weight still has a slight "fuzziness" even though the bits of the weight are in focus.