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ISO 10110 Optical Drawing Standards

ISO 10110. What is it?. 2. ISO standard describing preparation of drawings for optical elements and systemsDescribes features unique to optical components

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ISO 10110 Optical Drawing Standards

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    1. ISO 10110 Optical Drawing Standards Introduction to Opto-Mechanical Engineering OPTI 521 University of Arizona, College of Optical Sciences Jason Lane 13 December 2009

    2. ISO 10110 What is it? 2

    3. What do we do with this? 3

    4. ISO 10110 consists of 13 Optical Drawing Parts 4

    5. Material Imperfections 10110-2 thru 10110-4 2. Stress birefringence – 0/X, where X is maximum birefringence in nm/cm 3. Bubbles and Inclusions – 1/NxA, where N is number of permissible inclusions, and A is length of the side of a square in mm. A2 is area that the bubble / inclusion obscures. 4. Inhomogeneity and striae – 2/A;B A is class number for inhomogeneity (variation in index of refraction from nominal for (usually) the melt where the element came from) B is class for striae (variations in index of refraction inside the element) 5

    6. Surface form Tolerances ISO 10110-5 5. Surface form tolerances - 3/A(B/C) A is maximum spherical sag error from test plate B is the p-v maximum irregularity C is maximum rotationally symmetric p-v figure error (best fit aspheric surface) Units are fringes (one half wavelength, standardized at 546.07 nm). RMS specification for fringes can be used. Example: 3/4(1): sag tolerance of 4 fringes, p-v irregularity no greater than 1 fringe. 6

    7. Centring and surface imperfection tolerances ISO 10110-6 & 10110-7 4/a, where a is the angle between the datum and the surface (wedge angle) 7. Surface imperfection tolerances - 5/NxA. Treated similar to that of Part 3. Coating imperfections preceded by a C, long scratches preceded by an L, and edge chips by an E. Examples: 5/NxA; CN’xA’;LN”xA”,EA’”. A’” is the chip protrusion from the edge. 7

    8. Surface Texture (Polish and Grind) ISO 10110-8 8

    9. Surface Treatment and Coatings ISO 10110-9 Can be indicated one of two ways as shown in the figure below. Fill in the box according to ISO 9211 – Very important 4-part standard describing coatings specifications Nothing comparable in ASME/ANSI world Example would be T = 0.9 for 450 < ? < 750. Could also refer to a graph indicated elsewhere in the drawing Could also refer to manufacturer’s coating trade name Also indicate a surface to be cemented. 9

    10. Compiling data in tabular form ISO 10110-10 Can become cluttered for simple element drawings. Tabular form provides simpler method of presenting information to avoid ambiguity and errors in reading Major optical design programs have adopted presenting ISO 10110 data in tabular form ZEMAX - used by Navy Code V - used by Raytheon (among others) This will be most common drawing form encountered 10

    11. Tabular Form example 11

    12. Non-toleranced Data ISO 10110-11 ISO 10110 standardizes tolerances when not called out. “Default” tolerances Entirely different than “shop tolerances” of ASME Y14’s. WARNING: Tolerances are very loose and may lead to undesirable consequences if not carefully considered. Note that tolerances scale with size of parts – a European practice rarely seen in U.S. 12

    13. Specifying Aspheres ISO 10110-12 Similar to procedure as for ordinary surfaces Exceptions: Surface type is called out clearly “asphere” or by type of asphere for standard types Equation which describes the surface is given in a note. Slope tolerance (rate of change in surface sag) and sampling length should be specified) Datums defined differently than in ISO 5459 (the GD&T ISO) due to fact that aspheric surfaces are located mechanically during fabrication and when mounting. If alternate datum is desired, a note on the drawing should be included 13

    14. Laser Damage Thresholds ISO 10110-13 Indication is given by 6/Hth; ?; pdg; fp; nTS x np for pulsed lasers 6/Eth; ?; nTS for continuous lasers. “6/” is the indication for laser damage specification. ? is the wavelength of the laser. “pdg” is the pulse duration group number from ISO 11254 “fp” is the pulse repetition rate in Hz “nTS” is the number of test sites on the sample surface “np” is the number of laser pulses applied to each site. Hth is expressed in terms of maximum energy density (J/cm2) Eth is the maximum power density (W/cm2) for continuous tests. 14

    15. Returning to our ISO 10110 drawing… 15

    16. Explanation for the callouts on the preceding drawing 16

    17. References for further information Tutorial on ISO 10110 Optical Drawing Standards, Jason Lane. Tutorial white paper which accompanies this presentation (lists all the ISO standards relating to optics and optical systems). See me for copy. ISO 10110 Optics and Optical Instruments – Preparation of drawings for optical elements and systems: A User’s Guide by Ronald K. Kimmel and Robert E. Parks The ISO 10110 standards themselves (and ISO 9211) SPIE regularly hosts ISO 10110 short courses taught by David M. Aikens. Available on spie.org website 17

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