Starting from a diamond material which shows a difference in its absorption characteristics after exposure to radiation with an energy of at least 5. The catalyst comprises a support of a tungstated oxide or hydroxide of a Group IVB metal, a phosphorus component, and at least one platinum-group metal component which is preferably platinum. When incident light is received by the lens and reflected to the reflector, the reflector upwardly reflects one part of the incident light through 90 degrees to image convertor, and refracts the other part of the incident light to a back side of the reflector. Such a puncture closure device may be positioned at least partially within an insertion sheath to form a puncture closure assembly.