An imaging apparatus includes an imaging unit, a peak image generating unit, a background image generating unit, a composing unit, and a display unit. A reticle containing custom arrays of box-in-box test structures specifically designed for performing source or exit pupil division using an aperture plate is exposed onto a resist coated wafer several times. Therefore, large internal stress does not occur in the adhesive even under conditions of high temperature and high humidity. The cathode is configured over the light-emitting layer. The pull rod extends through an outer pumping chamber in the fluid pumping assembly and forms a fluid plunger within this chamber.