Reference Beam Attenuator for IR Spectrophofometer
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Although other types of ir-reference bean attenuators have been ~ thought it to he useful t o present one presented in THIS J O U R N Awe with professional performrtnce which we use in our research work and which is very easy t o make. An iron toolaf about 0.4 mm thickness and side dimensions adapted to spectraphotometer t o be used, is cut in as represented by the figure. Subsequently, the blsdes are twisted over 90' while the end is firmly held with s grip. The front view shows that the blades become comb shmed. To finish the niece.. it may be blackened with blackboard pairkt in order to avoid rdlrrtiom. The nttenuntor is iuspmdrcl will, a slide wire or, for preririnn work, fixed with n arrcw-driven rnechxuiml.
B FRONT VIEW
Journal of Chemical Educofion
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