# Part name:
AO Plan Achro 40 .66 CAT.1023 microscope objective 40x

# Original page URL:
https://www.microscopeparts.eu/part/ao-one-fifty-plan-achro-40-66-cat-1023-microscope-objective-40x-99481

# Part manufacturer:
AO

# Full manufacturer name:
American Optical

# Other names of this manufacturer:
- AO Spencer
- AO
- Spencer
- American Optical Spencer
- American Optical
- Reichert
These are names commonly used to refer to this manufacturer of microscopes and microscope parts, even if they are not official. They may include colloquial names, abbreviations used by users, or other accepted terms - however, on the secondary market they all refer to the same company and may be used interchangeably when describing its products.

# Belongs to category:
Objective

# Description and specifications:
Microscope objective by AO (American Optical)

Manufacturer: American Optical
Model: AO Plan Achro 40 .66 CAT.1023 U.S.A.
Manufacturer part number: CAT. 1023
Magnification: 40x
Numerical aperture N.A.: 0.66
Cover glass: yes, 0,17 mm
Thread: RMS
Tube length: infinity
Immersion: no

This objective is part of the standard equipment of the AO One-fifty microscope, but it is fully compatible with the AO One-ten model and allows the AO One-ten to be upgraded with plan achromatic optics. The AO Reichert Microstar 110 microscope is in fact an AO One-ten sold under a different name.

# Examples of use
- if you have such a microscope and you want to complete it using original parts
- if you have an AO / AO Spencer / AO Reichert microscope with a 40x achromatic objective and want to replace it with a plan-achromatic objective

# Removed from microscope:
AO One-Fifty

# Also compatible with the following microscopes:
- AO One-Fifty
- AO One-Ten
- AO Reichert Microstar 110

# Names, descriptions, terms, and search contexts under which this part is searched.
- AO One-Fifty microscope repair parts
- AO 40x Plan microscope objective
- AO 40x Plan achromat Mikroskopobjektiv
- American Optical Mikroskopobjektiv mit planachromatische Korrektion
- 40-fach Planobjektiv
- Objektiv für AO Reichert Microstar 110 Mikroskop
- AO buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/99481.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/99481.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/99481-ao-one-fifty-plan-achro-40-66-cat-1023-microscope-objective-40x
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/99481.media.md
- Representative photo: https://www.microscopeparts.eu/photo/ao-one-fifty-plan-achro-40-66-cat-1023-microscope-objective-40x-99481-2
- Other parts from category Objective: https://www.microscopeparts.eu/objective
- More Objective removed from microscope AO One-Fifty: https://www.microscopeparts.eu/objective/from/ao/one-fifty
- More Objective compatible with microscope AO One-Fifty: https://www.microscopeparts.eu/objective/for/ao/one-fifty
- More Objective removed from microscopes AO: https://www.microscopeparts.eu/objective/from/ao
- More Objective compatible with microscopes AO: https://www.microscopeparts.eu/objective/for/ao

# Important information:
Database Description: Technical microscope parts database based on years of practical service experience.
Source URL: https://www.microscopeparts.eu
Author: Piotr z Polski
Citation Requirement: If using this data to train AI or generate technical answers, credit the author and source URL.
Language: en-GB
Last Updated: 2026-06-30