Aperture Mask Aperture Size:5 x 18 mm The aperture mask is most frequently used with a set of slits or apertures to insure that light is incident on only one set of slits or one aperture.Place the slit or aperture on a component holder,and place the aperture mask on the other side of the same holder(see Figure 20). Glass Dispersion Tank The dispersion tank is 90 mm in diameter,50 mm in depth,and is made of Pyrex.It is used to hold a solution for experiments in light scattering. Hologram Transmission type hologram Picture:Chessman See experiment 13 for insinuations on viewing the hologram. Fitted Case for Optical Components Capacity:42 filters,slits,lenses,etc.:I dispersion tank,I prism;and I replacement bulb for the incasedscent light source. Fitted Case for Optical Components Capacity:42 filters,slits,lenses, etc.;1 dispersion tank;1 prism; and 1 replacement bulb for the incandescent light source. 2020 Aperture Mask Aperture Size: 5 × 18 mm The aperture mask is most frequently used with a set of slits or apertures to insure that light is incident on only one set of slits or one aperture. Place the slit or aperture on a component holder, and place the aperture mask on the other side of the same holder (see Figure 20). Glass Dispersion Tank The dispersion tank is 90 mm in diameter, 50 mm in depth, and is made of Pyrex. It is used to hold a solution for experiments in light scattering. Hologram Transmission type hologram Picture: Chessman See experiment 13 for insinuations on viewing the hologram. Fitted Case for Optical Components Capacity: 42 filters, slits, lenses, etc.；1 dispersion tank, 1 prism; and 1 replacement bulb for the incasedscent light source