Adobe Postscript’s setoverprint and setoverprintmode operations, an imager and Object Optimized Rendering technology can be combined to achieve a watermark result by either tagging lower image areas as text or other intents, or by changing color values. The plurality of pairs of NVM cells is electrically connected to word lines and bit lines. The replaceable wear elements may be used to retrofit existing filter plates. For example, the weight of the blade and the structure supporting the blade is prevented from backdriving the elevation mechanism and allowing the blade to drop. Thereby, by diffusing the strength of the leak light, the incident light to the one side end face 4 of the resin substrate 3 is made approximately even, and the direct entering of the leak light into the flat transparent substrate is suspended and thereby the generation of the bright line is suspended to realize an even and spread illumination.