Laser safety glasses

If a Fourier transform infrared spectrometer is being used, do not attempt to adjust the laser. Safety glasses must be worn in the laboratory at all times. Appropriate safety gloves and other personal protection equipment should be used when handling chemicals. 

We also note that laser safety glasses and laser goggles are not chemical splash goggles. Persons using lasers and wearing laser eye protection may or may not be handling solutions that pose a splash hazard but if such hazards exist in labs where lasers are used, chemists need to be mindful of what level of splash protection is afforded by the laser eye protection that they are using. If there is potential for a splash, a face shield should be worn. 

Many larger institutions have a Laser Safety Officer (LSO) who has been assigned the duty of reviewing the safety measures for using lasers in that institution. If your institution has an LSO, you should establish a working relationship with this person and learn as much as possible about safety measures. The LSO can assist you in the proper selection of laser safety glasses or goggles. 

Table 24—2 Criteria for laser safety glasses. Coi tesy ofthe United StMes De mtmen ...

Since NIR laser radiation is invisible, it is advisable - while wearing. safety glasses -to employ an infrared night vision instrument with a macro lens for the fine-adjustment of the sample. 

Glasses constructed to provide protection from the intense light of lasers and have filtered lenses to suit different lasers. They are required to meet American National Standards Institute (ANSI) Z87 and be clearly marked with the manufacturer s name. See also Safety Glasses. 

In addition to splashes and shrapnel, eyes are sensitive to ultraviolet (UV) and visible radiation. While normal levels of visible light are not harmful, exposure to either visible or UV lasers presents a significant hazard. Lasers are discussed separately in Section 7.3.3. Ultraviolet radiation hazards are discussed in Section 5.3.7 and special safety glasses and goggles are available to protect your eyes against this radiation. 

Safety glasses Protect eyes against iarge particles and projectiles. If lasers are used to survey a site, workers should wear special protective lenses. 

Laser eye safety is an important issue in the use of Raman spectroscopy in the teaching laboratory. The instructor should be aware that many instruments employ lasers sufficiently powerful that the user is required to wear safety glasses or goggles. Suitable safety goggles are available from most major laboratory supply houses. Eye protection from laser radi-... 

The breast is slightly eompressed between two glass plates. The laser light is delivered via an optieal fibre. The transmitted light is collected by four fibre bundles and fed to four deteetors. Fibres and fibre bundles are certainly not a favourable solution in terms of timing stability and detection efficiency. However, they de-eouple the eleetrieal part of the system from the patient. The fibres are therefore an important part of the system to satisfy safety regulations for medical instruments. 

A typical construction is shown in Fig. 14.24. The cell container is made of stainless steel, a corrosion-resistant glass-to-metal feed-through is used for the positive terminal, and the cell cover is laser sealed or welded to provide an hermetic closure. Safety devices, such as a vent and a fuse or a PTC device, are incorporated in the cell to protect against buildup of internal pressure or external short circuits. 

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