This creation provides the dental light meter that one kind can determine whether ultraviolet light, it includes: a shell has a show hole and a sensing hole； One control circuit board is arranged the what shell and has a processing unit； One display unit is to be electrically connected the control circuit board and be correspondingly arranged the what show hole； One sensing unit is to be electrically connected the control circuit board, which is sensed through the sensing hole； One power supply unit is to be electrically connected the control circuit board； And a ultraviolet light judging unit, the what shell is set. By above-mentioned design, user can be allowed rapidly to judge whether the light source in photo solidification machine contains ultraviolet light.本創作提供一種可判斷紫外光之牙科用測光錶，其包含：一殼體，具有一顯示孔及一感測孔；一控制電路板，其係設置於該殼體且具有一處理單元；一顯示單元，其係電連接該控制電路板並對應設置於該顯示孔；一感測單元，其係電連接該控制電路板，該感測單元係透過該感測孔進行感測；一供電單元，其係電連接該控制電路板；及一紫外光判斷單元，其係設置於該殼體。藉由上述之設計，能讓使用者快速地判斷光固化機中的光源是否含有紫外光。
